US20150278542A1 - Database access control - Google Patents
Database access control Download PDFInfo
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- US20150278542A1 US20150278542A1 US14/738,831 US201514738831A US2015278542A1 US 20150278542 A1 US20150278542 A1 US 20150278542A1 US 201514738831 A US201514738831 A US 201514738831A US 2015278542 A1 US2015278542 A1 US 2015278542A1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/62—Protecting access to data via a platform, e.g. using keys or access control rules
- G06F21/6218—Protecting access to data via a platform, e.g. using keys or access control rules to a system of files or objects, e.g. local or distributed file system or database
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/10—File systems; File servers
- G06F16/17—Details of further file system functions
- G06F16/176—Support for shared access to files; File sharing support
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/90—Details of database functions independent of the retrieved data types
- G06F16/95—Retrieval from the web
- G06F16/951—Indexing; Web crawling techniques
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- G06F17/30165—
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- G06F17/30864—
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/62—Protecting access to data via a platform, e.g. using keys or access control rules
- G06F21/6218—Protecting access to data via a platform, e.g. using keys or access control rules to a system of files or objects, e.g. local or distributed file system or database
- G06F21/6227—Protecting access to data via a platform, e.g. using keys or access control rules to a system of files or objects, e.g. local or distributed file system or database where protection concerns the structure of data, e.g. records, types, queries
Definitions
- This application relates to the field of database security, and more specifically to a system and method for providing database access control based on a categorization of data stored in a database system.
- An approach to protecting data stored in databases used by enterprises and organizations includes implementing systems and procedures that ensure safe and regulated access to such data and by preventing data retrieval attempts from unauthorized sources.
- a method for providing database access control includes receiving an access request from a requesting user, the access request identifying requested data and including user credentials identifying the requesting.
- the access request is parsed into the user credentials and the request for data.
- An authorization table is queried with the user credentials, where the authorization table stores one or more data categories, each associated with one or more users.
- a security table is retrieved that identifies a subset of the one or more data categories to which the requesting user has access.
- the method queries a base table based on the request for data and the retrieved security table.
- the base table includes a plurality of data entries, each mapped to at least one data category.
- a plurality of candidate data entries identified in the data request and mapped to categories identified in the security table is retrieved.
- a result set of data entries is generated and can be sent to the requesting user.
- FIG. 1 is a system environment diagram for a database access control system, according to one embodiment.
- FIG. 2 illustrates an implementation for providing database access control, according to one embodiment.
- FIGS. 3A-3B include a flowchart illustrating a process for providing database access control, according to one embodiment.
- FIG. 1 is a system environment diagram for a database access system, according to one embodiment.
- the system environment of FIG. 1 includes a database access control system 100 (“database access system” hereinafter), one or more clients 110 , and an access server 115 , communicatively coupled through a connecting network 105 .
- database access system database access system
- clients 110 clients 110
- an access server 115 communicatively coupled through a connecting network 105 .
- a user or other entity can use a client 110 to access the database access system 100 via the network 105 .
- Other embodiments of the system environment can contain different and/or additional components than those shown by FIG. 1 .
- a client 110 is a computing device capable of processing data as well as transmitting data to and receiving data from the other modules of FIG. 1 via the network 105 .
- the client 110 can be a desktop computer, laptop computer, smart phone, tablet computing device, server, payment terminal, or any other device having computing and data communication capabilities.
- Each client 110 includes one or more processors, memory, storage, and networking components.
- Each client 110 is coupled to the network 105 and can interact with other modules coupled to the network 105 using software such as a web browser or other application with communication functionality.
- Such software can include an interface for communicating with the other modules via the network 105 .
- the database access system 100 can be a computer, such as a server, a personal computer, and the like; a data center; a data storage device; or any other device.
- the client device 110 and/or the database access system 100 can be any device with a processor configured to execute instructions stored on a non-transitory computer-readable storage medium.
- the instructions stored on the non-transitory computer-readable storage medium include instructions configured to enable the client device 110 and/or the database access system 100 to perform the operations described herein.
- the client device 110 can include a monitor or display configured to display the result table 190 to the requesting user.
- the network 105 connecting the various modules is typically the Internet, but can be any network, including but not limited to a local area network (LAN), metropolitan area network (MAN), wide area network (WAN), cellular network, wired network, wireless network, private network, virtual private network (VPN), direct communication line, and the like.
- the network 105 can also be a combination of multiple different networks.
- a client 110 is configured to request access to data stored in the database access system 100 .
- the database access system 100 is configured to receive a request for data from a client 110 , determine the access rights assigned to a user of the client device 110 , and based on the user's access rights, to provide result data back to the client 110 .
- the database access system 100 includes an interface module 112 , a query processing module 120 , a security module 140 , an authorization table 150 , a security table 160 , a base table 170 , and a result generation module 180 .
- the interface module 112 provides an interface that allows a client 110 to interact with one or more of the components of the database access system 100 , and is one means for performing this function. In addition, the interface module 112 provides a communicative interface between components of the database access system 100 .
- the interface module 112 receives an access request from a requesting user (e.g., an individual using the client device 100 to communicate with database access system 100 ) for data stored in the database access control system 100 .
- the access request is received via a client device 110 configured to communicatively couple to and interact with the database access system 100 .
- the interface module 112 routes the received access request to the query processing module 120 .
- the query processing module 120 receives the access request from the interface module 112 and parses (e.g., segments or separates) the access request into user credentials (e.g., information associated with the identity of the user, such as a password or other user credentials, an organization or commercial entity to which the requesting user belongs, a security level of the requesting user, and the like), and a request for data identifying data stored within the base table 170 .
- user credentials e.g., information associated with the identity of the user, such as a password or other user credentials, an organization or commercial entity to which the requesting user belongs, a security level of the requesting user, and the like
- the query processing module 120 provides the parsed user credentials to the security module 140 , and queries base table 170 to retrieve data entries identified within the request for data.
- the security module 140 receives the user credentials from the query processing module 120 and queries an authorization table 150 based on the received user credentials.
- the authorization table 150 maps user credentials, user identities, data request contexts, and the like (simply “credentials” hereinafter) to data categories.
- the data categories mapped to a user's credentials are data categories that the user is authorized to access.
- the authorization table 150 can be populated according to an external security policy dictating which users can access each category of data and (optionally) the context in which the data portions can be accessed.
- the security module 140 retrieves, from the authorization table 150 , the data categories to which the requesting user is permitted access (e.g., data categories associated with associated with the user's credentials).
- the security module 140 generates a security table 160 based on the retrieved data categories associated with the user's credentials. In alternative embodiments, the security module 140 retrieves the security table 160 directly from the authorization table 150 .
- the security module 140 determines the data categories that a requesting user can access using one or more access requirements.
- Each access requirement is associated with one or more data categories, and specifies one or more characteristics associated with the requesting user or the context of the request that must be satisfied prior to allowing the requesting user to access the associated one or more data categories.
- the security module 140 can determine the data categories a requesting user can access by evaluating the access requirements to determine which access requirements the requesting user satisfies. For example, the security module can implement a set of access requirements configured to allow access to certain data categories only between certain times of day.
- the security module can implement a second set of access requirements that limit access to certain data categories based on the security credentials of the requesting user, or based on a software configuration of the client device of the requesting user.
- the security module 140 can identify categories of data that the user can access based on the time of the request and based on the user's credentials or client device software configuration.
- categories assigned to users in the authorization table are time-dependent or vary with time (e.g., time of day or week). For example, during business hours (e.g., between 9 AM and 5 PM) over week days, a certain user (e.g., user M, an employee of an organization or commercial enterprise) is assigned category X7 in the authorization table 150 , allowing him access to data entries Data1 and Data3 in the base table 170 (as explained with reference to FIG. 2 below). However, outside of work hours, the certain user is assigned category 9T which allows him access to Data2 and Data4 instead. Beneficially, organizations can conveniently restrict or allow access to different data entries based on a time of day or week, simply by modifying the relationship or mapping, in the authorization table 150 , between various users and data categories.
- the authorization table 150 can further include data access levels indicating a magnitude of data access to a data category that a user is granted.
- a data access level signifies a nature of access rights (e.g., no access, read/view only, read-write, delete) to the data entries in a particular data category to which a user has access.
- category X7 may provide “view only” access to the corresponding data entries (e.g., Data1 and Data3) whereas category 9T may provide read-write access to the associated data entries (e.g., Data2 and Data4).
- a data access level associated with a particular data category signifies fields or properties of the specific data entries (mapped to the particular data category in the base table) provided to a user authorized to access the particular data category. For example, with reference to FIG. 2 below, if data entries correspond to records of individual employees of an organization, a first user associated with data category X7 may be allowed to access to the properties or fields corresponding to names, addresses, and ages of the employees associated with data entries Data1 and Data3 in the base table 170 , but not to the properties or fields corresponding to social security numbers, phone numbers, and dates of birth for these data entries.
- a second user associated with data category IQ may be allowed to access to the all of the properties or fields corresponding to name, address, age, social security number, phone number, and date of birth for the employee associated with data entry Data5.
- the data access level specifies a set of properties of the specific data entries to which the corresponding user has access based on the particular data category.
- a data access level specified by a particular category signifies a nature of encryption of applied to specific data entries mapped to the particular category, thereby providing different levels of security and data protection to different data entries.
- the base table comprises an encrypted representation (e.g., via tokenization or an alternative form of encryption) of the data entries and the data categories, and accessing the base table comprises decrypting one or more of the encrypted data entries to access the plurality of data entries and corresponding data categories.
- the one or more data categories stored in the authorization table correspond to business entities, organizational groups, class years, social circles, data types, data classes, security levels, or any combination thereof.
- the security module 140 outputs one or more data categories to which the requesting user has access, for instance in the form of the security table 160 .
- the base table 170 includes a table of data entries, each data entry mapped to at least one data category.
- the base table 170 receives a query from the query processing module 120 to retrieve data entries identified by the data request, and outputs the identified data.
- the query processing module accesses the security table 160 , and queries the base table 170 for the data identified by the data request that is associated with at least one data category identified by the security table 160 .
- the data request can identify data categories associated with the requested data.
- the security module 140 queries the base table 170 with the data identified in the data request and with the data categories identified by the security table 160 .
- the base table 170 outputs only the data entries that are both identified by the data request and that are associated with at least one data category identified by the security table 160 .
- Such embodiments can reduce the time and resources required to retrieve large amounts of data from a base table 170 by limiting the retrieved data entries to only those to which the requesting user has access.
- the query processing module 120 queries the base table 170 with the data identified by the data request, and the base table 170 outputs the data entries identified by the data request (along with the data categories associated with these data entries).
- the data entries and associated data categories output by the base table are joined with the security table 160 at a join module (not shown in FIG. 1 ).
- the join module performs a join operation on the data entries received from the base table (and the associated data categories) and the security table, and outputs the data entries that are associated with data categories identified by the security table. For instance, the join module can eliminate the data entries from the base table that are not associated with at least one of the data categories identified in the security table, and outputs the remaining data entries.
- a pseudocode implementation of the security module and a join operation performed in response to an access request is as follows:
- Input user credentials Extract the user identity from the user credentials Get data categories from the authorization table and filter by user identity FOR each data category
- the result generation module 180 receives data entries and associated data categories from the base table 170 , and displays the received data entries and data categories as a result table to the requesting user.
- the result generation module 180 can format the result table for display to the requesting user, for instance based on a requested result table preference received from the user, or based on properties of a client device 100 used by the user.
- certain components of the database access system 100 can be located external to the database access system 100 .
- the security module 140 and the authorization table 150 can be included in an external security system.
- the result generation module 180 can be located in an external display system, or may be located within a client device 110 used by the requesting user.
- the data entries and data categories are described herein as organized and mapped to each other in the form of a table (e.g., authorization table 150 , security table 160 , or base table 170 ), in practice, and as will be recognized by one of ordinary skill in the art, such data entries and data categories can be organized in various alternative formats and data structures without departing from the scope of the disclosure.
- the database access control system 100 may be implemented using a single computer, or a network of computers, including cloud-based computer implementations.
- the operations of the database access control system 100 as described herein can be controlled through either hardware or through computer programs installed in computer storage and executed by the processors of such servers to perform the functions described herein.
- the database access control system 100 includes other hardware elements necessary for the operations described here, including network interfaces and protocols, input devices for data entry, and output devices for display, printing, or other presentations of data.
- the functions and operations of the database access control system 100 are sufficiently complex as to require implementation on a computer system, and cannot be performed in the human mind simply by mental steps.
- FIG. 2 illustrates an implementation for providing database access control within the database access control system of FIG. 1 , according to one embodiment.
- FIG. 2 illustrates an example database 100 , including a query processing module 120 , a security module 140 , an authorization table 150 , a base table 170 , and a result generation module 180 .
- the database 100 includes additional, fewer, or different components.
- a requesting user requests access to data stored in the base table 170 (access request 115 ) via an interface module 112 .
- the access request 115 includes user credentials 130 and the data request 165 .
- the user credentials 130 can include the identity of the requesting user (e.g., User A), a user password, or other user credentials.
- the data request 165 identifies one or more data entries stored in the base table 170 requested by User A.
- the access request 115 optionally includes additional information associated with the user or the context of the access request. For example, the access request can include the time of the request, the date of the request, the geographic location of the user, a security level of the user, a department or position of the user within an enterprise, and the like. Such information can be included in the access request 115 in metadata form.
- the access request 115 is optionally encrypted, tokenized, or otherwise protected.
- the query processing module 120 receives the access request 115 , and parses the access request 115 and provides the user credentials 130 to security module 140 and the data request 165 to query base table 170 .
- the security module 140 receives user credentials 130 and queries an authorization table 150 based on the user credentials 130 .
- the authorization table 150 associates a user's credentials with data categories that the user can access. Stated differently, authorization table 150 stores one or more data categories, each data category associated with one or more users. For example, as shown in FIG. 2 , the authorization table associates user B, user M, and user P with the data category X7; user A, user B, and user R with data category 9T; and user A and user U with data category IQ.
- the authorization table 150 in response to being queried by the security module 140 , the authorization table 150 outputs the data categories with which the user is associated, for example in the form of a security table 160 .
- the authorization table 150 outputs data categories 9T and IQ (data categories associated in the authorization table 150 with requesting user A) as the security table 160 .
- the security table 160 can be accessed by the query processing module 120 , the base table 170 , or the result generation module 180 .
- the query processing module 120 queries the base table 170 with the data request 165 .
- Data entries are stored in base table 170 , and each data entry is associated with a data category. For example, data entry “Data1” is associated with the data category “X7,” data entry “Data2” is associated with the data category “9T,” and so forth.
- the base table 170 retrieves the data entries identified in the received data request.
- the query processing module 120 can remove from the data request data that is not associated with a data category in the security table, or can include the data categories identified in the security table within the data request 165 .
- the query processing module 120 queries the base table 170 with the data request 165 , the base table 170 accesses the data categories identified in the security table 160 and outputs only the requested data associated with a category in the security table.
- the base table 170 can output all requested data entries to the result generation module 180 , and the result generation module can access the security table 160 and can output only the data associated with a category identified by the security table.
- the base table 160 will output data entry “Data3” (associated with data category “X7”), but will not output data entry “Data2” (associated with data category “9T,” which is not identified in the security table).
- the base table 170 is organized into rows and columns, wherein each row includes a data entry (in a first column) and a data category associated with the data entry (in a second column).
- the columns and rows of the base table can be encrypted with various encryption algorithms and/or tokenized with various token tables.
- the result generation module 180 receives data entries and associated data categories from the base table 170 , and transmits the received result data entries (e.g., as a result table 190 ) to User A.
- the result generation module 180 optionally formats the result table 190 for display to the requesting user.
- User A requests data entries “Data3,” “Data4,” and “Data5” stored in the base table 170 .
- the security module 140 determines that User A has access to data categories “9T” and “IQ.” Accordingly, the base table 170 outputs all data entries associated with data categories “9T” and “IQ” identified by the data request (“Data4” and “Data5”).
- the result generation module 180 then outputs a result table 190 including data entries “Data4,” and “Data5;” but not “Data3.”
- FIG. 3 is a flowchart that illustrates the process 300 for providing database access control, according to one embodiment.
- a database access system receives 305 an access request from a requesting user, the access request comprising user credentials identifying the requesting user and a request for data identifying data stored in a base table.
- the database access system parses 310 the access request into the user credentials and the request for data.
- the database access system queries 315 an authorization table based on the user credentials.
- the authorization table stores one or more data categories, each data category associated with one or more users.
- the database control system retrieves 320, from the authorization table, a security table that identifies data categories to which the requesting user has access.
- the database access system accesses 325 a base table that comprises a plurality of data entries, each data entry mapped to at least one data category.
- the database access system identifies 330 , from the base table, a plurality of candidate data entries identified by the data request.
- the database access system generates 335 a result set including result data entries from the plurality of candidate data entries, each result data entry associated with a data category included in the generated security table.
- generating the result set includes performing a join operation between the generated security table and a table formed by the identified plurality of candidate data entries and their corresponding categories. In such embodiments, generating the result set further includes selecting the result data entries associated with data categories included in the generated security table or, alternatively, eliminating the result data entries associated with data categories not included in the generated security table.
- the database access system sends 340 the generated result set (e.g., in the form of a result table) to the requesting user.
- Certain aspects of the present invention include process steps and instructions described herein in the form of an algorithm. It should be noted that the process steps and instructions of the present invention could be embodied in software, firmware or hardware, and when embodied in software, could be downloaded to reside on and be operated from different platforms used by real time network operating systems.
- the present invention also relates to an apparatus for performing the operations herein.
- This apparatus may be specially constructed for the required purposes, or it may include a general-purpose computer selectively activated or reconfigured by a computer program stored on a non-transitory computer readable medium that can be accessed by the computer.
- a computer program may be stored in a computer readable storage medium, such as, but is not limited to, any type of disk including floppy disks, optical disks, CD-ROMs, magnetic-optical disks, read-only memories (ROMs), random access memories (RAMs), EPROMs, EEPROMs, magnetic or optical cards, application specific integrated circuits (ASICs), or any type of computer-readable storage medium suitable for storing electronic instructions, and each coupled to a computer system bus.
- the computers referred to in the specification may include a single processor or may be architectures employing multiple processor designs for increased computing capability.
- the present invention is well suited to a wide variety of computer network systems over numerous topologies.
- the configuration and management of large networks include storage devices and computers that are communicatively coupled to dissimilar computers and storage devices over a network, such as the Internet.
Abstract
A method for database access control includes receiving an access request from a requesting user, the access request identifying one or more data entries stored in a base table storing a plurality a data entries each associated with a data category. The identified one or more data entries from the base table are retrieved and a security table including one or more data categories to which the requesting user is authorized to access is generated based on an identity of the requesting user. The data entries associated with a data category included in the security table are outputted as a result table.
Description
- This application is a continuation of U.S. application Ser. No. 14/037,302, filed Sep. 25, 2013, now U.S. Pat. No. ______, which application claims the benefit of Provisional Application No. 61/706,043 filed on Sep. 26, 2012, all of which are incorporated herein by reference.
- This application relates to the field of database security, and more specifically to a system and method for providing database access control based on a categorization of data stored in a database system.
- Most business enterprises and organizations store large volumes of data (such as business records, financial records, personnel records, and the like) that is of significant commercial importance. Such data is frequently organized and stored in a structured manner in databases within storage servers. These databases are integral to the existence and functioning of such commercial enterprises and organizations. Accordingly, the protection of data stored in these databases is therefore of great importance.
- An approach to protecting data stored in databases used by enterprises and organizations includes implementing systems and procedures that ensure safe and regulated access to such data and by preventing data retrieval attempts from unauthorized sources.
- In one embodiment, a method for providing database access control includes receiving an access request from a requesting user, the access request identifying requested data and including user credentials identifying the requesting. The access request is parsed into the user credentials and the request for data. An authorization table is queried with the user credentials, where the authorization table stores one or more data categories, each associated with one or more users. In response to querying the authorization table, a security table is retrieved that identifies a subset of the one or more data categories to which the requesting user has access.
- The method queries a base table based on the request for data and the retrieved security table. The base table includes a plurality of data entries, each mapped to at least one data category. In response, a plurality of candidate data entries identified in the data request and mapped to categories identified in the security table is retrieved. A result set of data entries is generated and can be sent to the requesting user.
- The features and advantages described in this summary and the following detailed description are not all-inclusive. Many additional features and advantages will be apparent to one of ordinary skill in the art in view of the drawings, specification, and claims hereof.
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FIG. 1 is a system environment diagram for a database access control system, according to one embodiment. -
FIG. 2 illustrates an implementation for providing database access control, according to one embodiment. -
FIGS. 3A-3B include a flowchart illustrating a process for providing database access control, according to one embodiment. - The figures (Figs.) depict embodiments for purposes of illustration only. One skilled in the art will readily recognize from the following description that alternative embodiments of the structures and methods illustrated herein can be employed without departing from the principles of the invention described herein.
- Reference will now be made in detail to several embodiments, examples of which are illustrated in the accompanying figures. It is noted that wherever practicable, similar or like reference numbers can be used in the figures and can indicate similar or like functionality. The figures depict embodiments of the disclosed system (or method) for purposes of illustration only. One skilled in the art will readily recognize from the following description that alternative embodiments of the structures and methods illustrated herein can be employed without departing from the principles described herein.
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FIG. 1 is a system environment diagram for a database access system, according to one embodiment. The system environment ofFIG. 1 includes a database access control system 100 (“database access system” hereinafter), one ormore clients 110, and anaccess server 115, communicatively coupled through a connectingnetwork 105. A user or other entity can use aclient 110 to access thedatabase access system 100 via thenetwork 105. Other embodiments of the system environment can contain different and/or additional components than those shown byFIG. 1 . - A
client 110 is a computing device capable of processing data as well as transmitting data to and receiving data from the other modules ofFIG. 1 via thenetwork 105. For example, theclient 110 can be a desktop computer, laptop computer, smart phone, tablet computing device, server, payment terminal, or any other device having computing and data communication capabilities. Eachclient 110 includes one or more processors, memory, storage, and networking components. Eachclient 110 is coupled to thenetwork 105 and can interact with other modules coupled to thenetwork 105 using software such as a web browser or other application with communication functionality. Such software can include an interface for communicating with the other modules via thenetwork 105. In some embodiments of the environment ofFIG. 1 , there can be any number of theclients 110,access servers 115, anddatabase access systems 100 connected to thenetwork 105 and communicating with one or more other modules. - The
database access system 100 can be a computer, such as a server, a personal computer, and the like; a data center; a data storage device; or any other device. Theclient device 110 and/or thedatabase access system 100 can be any device with a processor configured to execute instructions stored on a non-transitory computer-readable storage medium. The instructions stored on the non-transitory computer-readable storage medium include instructions configured to enable theclient device 110 and/or thedatabase access system 100 to perform the operations described herein. Theclient device 110 can include a monitor or display configured to display the result table 190 to the requesting user. - The
network 105 connecting the various modules is typically the Internet, but can be any network, including but not limited to a local area network (LAN), metropolitan area network (MAN), wide area network (WAN), cellular network, wired network, wireless network, private network, virtual private network (VPN), direct communication line, and the like. Thenetwork 105 can also be a combination of multiple different networks. - A
client 110 is configured to request access to data stored in thedatabase access system 100. Thedatabase access system 100 is configured to receive a request for data from aclient 110, determine the access rights assigned to a user of theclient device 110, and based on the user's access rights, to provide result data back to theclient 110. Thedatabase access system 100 includes aninterface module 112, aquery processing module 120, asecurity module 140, an authorization table 150, a security table 160, a base table 170, and aresult generation module 180. - The
interface module 112 provides an interface that allows aclient 110 to interact with one or more of the components of thedatabase access system 100, and is one means for performing this function. In addition, theinterface module 112 provides a communicative interface between components of thedatabase access system 100. Theinterface module 112 receives an access request from a requesting user (e.g., an individual using theclient device 100 to communicate with database access system 100) for data stored in the databaseaccess control system 100. In one embodiment, the access request is received via aclient device 110 configured to communicatively couple to and interact with thedatabase access system 100. Theinterface module 112 routes the received access request to thequery processing module 120. - The
query processing module 120 receives the access request from theinterface module 112 and parses (e.g., segments or separates) the access request into user credentials (e.g., information associated with the identity of the user, such as a password or other user credentials, an organization or commercial entity to which the requesting user belongs, a security level of the requesting user, and the like), and a request for data identifying data stored within the base table 170. Thequery processing module 120 provides the parsed user credentials to thesecurity module 140, and queries base table 170 to retrieve data entries identified within the request for data. - The
security module 140 receives the user credentials from thequery processing module 120 and queries an authorization table 150 based on the received user credentials. The authorization table 150 maps user credentials, user identities, data request contexts, and the like (simply “credentials” hereinafter) to data categories. The data categories mapped to a user's credentials are data categories that the user is authorized to access. The authorization table 150 can be populated according to an external security policy dictating which users can access each category of data and (optionally) the context in which the data portions can be accessed. Thesecurity module 140 retrieves, from the authorization table 150, the data categories to which the requesting user is permitted access (e.g., data categories associated with associated with the user's credentials). Thesecurity module 140 generates a security table 160 based on the retrieved data categories associated with the user's credentials. In alternative embodiments, thesecurity module 140 retrieves the security table 160 directly from the authorization table 150. - In alternative embodiments, the
security module 140 determines the data categories that a requesting user can access using one or more access requirements. Each access requirement is associated with one or more data categories, and specifies one or more characteristics associated with the requesting user or the context of the request that must be satisfied prior to allowing the requesting user to access the associated one or more data categories. Accordingly, thesecurity module 140 can determine the data categories a requesting user can access by evaluating the access requirements to determine which access requirements the requesting user satisfies. For example, the security module can implement a set of access requirements configured to allow access to certain data categories only between certain times of day. Similarly, the security module can implement a second set of access requirements that limit access to certain data categories based on the security credentials of the requesting user, or based on a software configuration of the client device of the requesting user. In these examples, when a user requests access to data, thesecurity module 140 can identify categories of data that the user can access based on the time of the request and based on the user's credentials or client device software configuration. - Stated differently, in some embodiments, categories assigned to users in the authorization table are time-dependent or vary with time (e.g., time of day or week). For example, during business hours (e.g., between 9 AM and 5 PM) over week days, a certain user (e.g., user M, an employee of an organization or commercial enterprise) is assigned category X7 in the authorization table 150, allowing him access to data entries Data1 and Data3 in the base table 170 (as explained with reference to
FIG. 2 below). However, outside of work hours, the certain user is assignedcategory 9T which allows him access to Data2 and Data4 instead. Beneficially, organizations can conveniently restrict or allow access to different data entries based on a time of day or week, simply by modifying the relationship or mapping, in the authorization table 150, between various users and data categories. - The authorization table 150 can further include data access levels indicating a magnitude of data access to a data category that a user is granted. In some embodiments, a data access level signifies a nature of access rights (e.g., no access, read/view only, read-write, delete) to the data entries in a particular data category to which a user has access. For example, with reference to
FIG. 2 below, category X7 may provide “view only” access to the corresponding data entries (e.g., Data1 and Data3) whereascategory 9T may provide read-write access to the associated data entries (e.g., Data2 and Data4). - In some embodiments, a data access level associated with a particular data category signifies fields or properties of the specific data entries (mapped to the particular data category in the base table) provided to a user authorized to access the particular data category. For example, with reference to
FIG. 2 below, if data entries correspond to records of individual employees of an organization, a first user associated with data category X7 may be allowed to access to the properties or fields corresponding to names, addresses, and ages of the employees associated with data entries Data1 and Data3 in the base table 170, but not to the properties or fields corresponding to social security numbers, phone numbers, and dates of birth for these data entries. On the other hand, a second user associated with data category IQ may be allowed to access to the all of the properties or fields corresponding to name, address, age, social security number, phone number, and date of birth for the employee associated with data entry Data5. Stated differently, in some embodiments, the data access level specifies a set of properties of the specific data entries to which the corresponding user has access based on the particular data category. - In some embodiments, a data access level specified by a particular category signifies a nature of encryption of applied to specific data entries mapped to the particular category, thereby providing different levels of security and data protection to different data entries. In some embodiments, the base table comprises an encrypted representation (e.g., via tokenization or an alternative form of encryption) of the data entries and the data categories, and accessing the base table comprises decrypting one or more of the encrypted data entries to access the plurality of data entries and corresponding data categories.
- In some embodiments, the one or more data categories stored in the authorization table correspond to business entities, organizational groups, class years, social circles, data types, data classes, security levels, or any combination thereof.
- It should be noted that some data categories can be associated with multiple access requirements that must each be satisfied before the data categories can be accessed by a requesting user. In these and other embodiments, the
security module 140 outputs one or more data categories to which the requesting user has access, for instance in the form of the security table 160. - The base table 170 includes a table of data entries, each data entry mapped to at least one data category. The base table 170 receives a query from the
query processing module 120 to retrieve data entries identified by the data request, and outputs the identified data. In some embodiments, the query processing module accesses the security table 160, and queries the base table 170 for the data identified by the data request that is associated with at least one data category identified by the security table 160. In such embodiments, the data request can identify data categories associated with the requested data. - In some embodiments, the
security module 140 queries the base table 170 with the data identified in the data request and with the data categories identified by the security table 160. In such embodiments, the base table 170 outputs only the data entries that are both identified by the data request and that are associated with at least one data category identified by the security table 160. Such embodiments can reduce the time and resources required to retrieve large amounts of data from a base table 170 by limiting the retrieved data entries to only those to which the requesting user has access. - In yet other embodiments, the
query processing module 120 queries the base table 170 with the data identified by the data request, and the base table 170 outputs the data entries identified by the data request (along with the data categories associated with these data entries). In such embodiments, the data entries and associated data categories output by the base table are joined with the security table 160 at a join module (not shown inFIG. 1 ). The join module performs a join operation on the data entries received from the base table (and the associated data categories) and the security table, and outputs the data entries that are associated with data categories identified by the security table. For instance, the join module can eliminate the data entries from the base table that are not associated with at least one of the data categories identified in the security table, and outputs the remaining data entries. - A pseudocode implementation of the security module and a join operation performed in response to an access request is as follows:
- Input user credentials
Extract the user identity from the user credentials
Get data categories from the authorization table and filter by user identity
FOR each data category - Output one row in the security table
- Input access request
FOR each row in the base table - IF data row.category equals security table.category THEN
-
- Send row to Result
Generation Module 180
- Send row to Result
- ELSE
-
- Skip the row
- ENDIF
- The
result generation module 180 receives data entries and associated data categories from the base table 170, and displays the received data entries and data categories as a result table to the requesting user. Theresult generation module 180 can format the result table for display to the requesting user, for instance based on a requested result table preference received from the user, or based on properties of aclient device 100 used by the user. - It should be noted that in some embodiments, certain components of the
database access system 100 can be located external to thedatabase access system 100. For example, thesecurity module 140 and the authorization table 150 can be included in an external security system. Similarly, theresult generation module 180 can be located in an external display system, or may be located within aclient device 110 used by the requesting user. Furthermore, while the data entries and data categories are described herein as organized and mapped to each other in the form of a table (e.g., authorization table 150, security table 160, or base table 170), in practice, and as will be recognized by one of ordinary skill in the art, such data entries and data categories can be organized in various alternative formats and data structures without departing from the scope of the disclosure. - The database
access control system 100 may be implemented using a single computer, or a network of computers, including cloud-based computer implementations. The operations of the databaseaccess control system 100 as described herein can be controlled through either hardware or through computer programs installed in computer storage and executed by the processors of such servers to perform the functions described herein. The databaseaccess control system 100 includes other hardware elements necessary for the operations described here, including network interfaces and protocols, input devices for data entry, and output devices for display, printing, or other presentations of data. The functions and operations of the databaseaccess control system 100 are sufficiently complex as to require implementation on a computer system, and cannot be performed in the human mind simply by mental steps. -
FIG. 2 illustrates an implementation for providing database access control within the database access control system ofFIG. 1 , according to one embodiment.FIG. 2 illustrates anexample database 100, including aquery processing module 120, asecurity module 140, an authorization table 150, a base table 170, and aresult generation module 180. In other embodiments, thedatabase 100 includes additional, fewer, or different components. - A requesting user, User A in the example of
FIG. 2 , requests access to data stored in the base table 170 (access request 115) via aninterface module 112. In some embodiments, theaccess request 115 includesuser credentials 130 and thedata request 165. - The
user credentials 130 can include the identity of the requesting user (e.g., User A), a user password, or other user credentials. The data request 165 identifies one or more data entries stored in the base table 170 requested by User A. Theaccess request 115 optionally includes additional information associated with the user or the context of the access request. For example, the access request can include the time of the request, the date of the request, the geographic location of the user, a security level of the user, a department or position of the user within an enterprise, and the like. Such information can be included in theaccess request 115 in metadata form. Theaccess request 115 is optionally encrypted, tokenized, or otherwise protected. - The
query processing module 120 receives theaccess request 115, and parses theaccess request 115 and provides theuser credentials 130 tosecurity module 140 and the data request 165 to query base table 170. - The
security module 140 receivesuser credentials 130 and queries an authorization table 150 based on theuser credentials 130. The authorization table 150 associates a user's credentials with data categories that the user can access. Stated differently, authorization table 150 stores one or more data categories, each data category associated with one or more users. For example, as shown inFIG. 2 , the authorization table associates user B, user M, and user P with the data category X7; user A, user B, and user R withdata category 9T; and user A and user U with data category IQ. - As illustrated in
FIG. 2 , in response to being queried by thesecurity module 140, the authorization table 150 outputs the data categories with which the user is associated, for example in the form of a security table 160. In the example ofFIG. 2 , the authorization table 150outputs data categories 9T and IQ (data categories associated in the authorization table 150 with requesting user A) as the security table 160. As described above, the security table 160 can be accessed by thequery processing module 120, the base table 170, or theresult generation module 180. - The
query processing module 120 queries the base table 170 with thedata request 165. Data entries are stored in base table 170, and each data entry is associated with a data category. For example, data entry “Data1” is associated with the data category “X7,” data entry “Data2” is associated with the data category “9T,” and so forth. The base table 170 retrieves the data entries identified in the received data request. - In embodiments where the
query processing module 120 accesses the security table 160, the query processing module can remove from the data request data that is not associated with a data category in the security table, or can include the data categories identified in the security table within thedata request 165. In some embodiments, thequery processing module 120 queries the base table 170 with thedata request 165, the base table 170 accesses the data categories identified in the security table 160 and outputs only the requested data associated with a category in the security table. Alternatively, the base table 170 can output all requested data entries to theresult generation module 180, and the result generation module can access the security table 160 and can output only the data associated with a category identified by the security table. - For example, if User A requests data entries “Data2” and “Data3,” and if the security table 160 identifies only data category “X7,” then in embodiments where the base table 170 has access to the security table, the base table will output data entry “Data3” (associated with data category “X7”), but will not output data entry “Data2” (associated with data category “9T,” which is not identified in the security table).
- In one embodiment, as shown in
FIG. 2 , the base table 170 is organized into rows and columns, wherein each row includes a data entry (in a first column) and a data category associated with the data entry (in a second column). The columns and rows of the base table can be encrypted with various encryption algorithms and/or tokenized with various token tables. - In some embodiments, the
result generation module 180 receives data entries and associated data categories from the base table 170, and transmits the received result data entries (e.g., as a result table 190) to User A. Theresult generation module 180 optionally formats the result table 190 for display to the requesting user. In an example, User A requests data entries “Data3,” “Data4,” and “Data5” stored in the base table 170. Thesecurity module 140 then determines that User A has access to data categories “9T” and “IQ.” Accordingly, the base table 170 outputs all data entries associated with data categories “9T” and “IQ” identified by the data request (“Data4” and “Data5”). Theresult generation module 180 then outputs a result table 190 including data entries “Data4,” and “Data5;” but not “Data3.” -
FIG. 3 is a flowchart that illustrates theprocess 300 for providing database access control, according to one embodiment. A database access system receives 305 an access request from a requesting user, the access request comprising user credentials identifying the requesting user and a request for data identifying data stored in a base table. - The database access system parses 310 the access request into the user credentials and the request for data. The database access system queries 315 an authorization table based on the user credentials. The authorization table stores one or more data categories, each data category associated with one or more users. The database control system retrieves 320, from the authorization table, a security table that identifies data categories to which the requesting user has access.
- The database access system accesses 325 a base table that comprises a plurality of data entries, each data entry mapped to at least one data category. The database access system identifies 330, from the base table, a plurality of candidate data entries identified by the data request. The database access system generates 335 a result set including result data entries from the plurality of candidate data entries, each result data entry associated with a data category included in the generated security table.
- In some embodiments, generating the result set includes performing a join operation between the generated security table and a table formed by the identified plurality of candidate data entries and their corresponding categories. In such embodiments, generating the result set further includes selecting the result data entries associated with data categories included in the generated security table or, alternatively, eliminating the result data entries associated with data categories not included in the generated security table. The database access system sends 340 the generated result set (e.g., in the form of a result table) to the requesting user.
- The present invention has been described in particular detail with respect to one possible embodiment. Those of skill in the art will appreciate that the invention may be practiced in other embodiments. First, the particular naming of the components and variables, capitalization of terms, the attributes, data structures, or any other programming or structural aspect is not mandatory or significant, and the mechanisms that implement the invention or its features may have different names, formats, or protocols. Also, the particular division of functionality between the various system components described herein is merely exemplary, and not mandatory; functions performed by a single system component may instead be performed by multiple components, and functions performed by multiple components may instead performed by a single component.
- It should be noted that various functionalities described herein may be combined in ways not explicitly described. Some portions of above description present the features of the present invention in terms of algorithms and symbolic representations of operations on information. These algorithmic descriptions and representations are the means used by those skilled in the data processing arts to most effectively convey the substance of their work to others skilled in the art. These operations, while described functionally or logically, are understood to be implemented by computer programs. Furthermore, it has also proven convenient at times, to refer to these arrangements of operations as modules or by functional names, without loss of generality.
- Unless specifically stated otherwise as apparent from the above discussion, it is appreciated that throughout the description, discussions utilizing terms such as “determine” refer to the action and processes of a computer system, or similar electronic computing device, that manipulates and transforms data represented as physical (electronic) quantities within the computer system memories or registers or other such information storage, transmission or display devices.
- Certain aspects of the present invention include process steps and instructions described herein in the form of an algorithm. It should be noted that the process steps and instructions of the present invention could be embodied in software, firmware or hardware, and when embodied in software, could be downloaded to reside on and be operated from different platforms used by real time network operating systems.
- The present invention also relates to an apparatus for performing the operations herein. This apparatus may be specially constructed for the required purposes, or it may include a general-purpose computer selectively activated or reconfigured by a computer program stored on a non-transitory computer readable medium that can be accessed by the computer. Such a computer program may be stored in a computer readable storage medium, such as, but is not limited to, any type of disk including floppy disks, optical disks, CD-ROMs, magnetic-optical disks, read-only memories (ROMs), random access memories (RAMs), EPROMs, EEPROMs, magnetic or optical cards, application specific integrated circuits (ASICs), or any type of computer-readable storage medium suitable for storing electronic instructions, and each coupled to a computer system bus. Furthermore, the computers referred to in the specification may include a single processor or may be architectures employing multiple processor designs for increased computing capability.
- The algorithms and operations presented herein are not inherently related to any particular computer or other apparatus. Various general-purpose systems may also be used with programs in accordance with the teachings herein, or it may prove convenient to construct more specialized apparatus to perform the required method steps. The required structure for a variety of these systems will be apparent to those of skill in the art, along with equivalent variations. In addition, the present invention is not described with reference to any particular programming language. It is appreciated that a variety of programming languages may be used to implement the teachings of the present invention as described herein, and any references to specific languages are provided for invention of enablement and best mode of the present invention.
- The present invention is well suited to a wide variety of computer network systems over numerous topologies. Within this field, the configuration and management of large networks include storage devices and computers that are communicatively coupled to dissimilar computers and storage devices over a network, such as the Internet.
- Finally, it should be noted that the language used in the specification has been principally selected for readability and instructional purposes, and may not have been selected to delineate or circumscribe the inventive subject matter. Accordingly, the disclosure of the present invention is intended to be illustrative, but not limiting, of the scope of the invention, which is set forth in the following claims.
Claims (20)
1. A method for database access control, comprising:
receiving an access request from a requesting user, the access request comprising user credentials identifying the requesting user and identifying requested data, the requesting user having access to one or more data categories;
generating a security table that identifies the one or more data categories to which the requesting user has access;
generating, based on a query of a base table that maps each of a plurality of data entries to at least one data category of the one or more data categories, a candidate data entry table that includes data entries identified by the access request and the data categories to which each included data entry is mapped within the base table;
performing a join operation between the security table and the candidate data entry table to generate a result set, each result in the result set comprising a data entry within the candidate data entry table mapped to at least one data category included within the security table; and
providing the generated result set to the requesting user.
2. The method of claim 1 , wherein at least one data category to which the requesting user has access is dependent on a time that the access request is received.
3. The method of claim 1 , wherein at least one data category to which the requesting user has access is based on a data access level indicating a maximum magnitude of data access to specific data entries within the at least one data category.
4. The method of claim 1 , wherein:
the base table comprises an encrypted representation of the data entries and the data categories; and
querying the base table comprises decrypting one or more of the encrypted data entries to access the plurality of data entries and corresponding data categories.
5. The method of claim 1 , wherein the one or more data categories correspond to business entities, organizational groups, class years, social circles, data types, data classes, security levels, or any combination thereof.
6. A database access control system, comprising:
a non-transitory computer-readable memory storing executable computer instructions, the instructions comprising instructions for:
receiving an access request from a requesting user, the access request comprising user credentials identifying the requesting user and identifying requested data, the requesting user having access to one or more data categories;
generating a security table that identifies the one or more data categories to which the requesting user has access;
generating, based on a query of a base table that maps each of a plurality of data entries to at least one data category of the one or more data categories, a candidate data entry table that includes data entries identified by the access request and the data categories to which each included data entry is mapped within the base table;
performing a join operation between the security table and the candidate data entry table to generate a result set, each result in the result set comprising a data entry within the candidate data entry table mapped to at least one data category included within the security table; and
providing the generated result set to the requesting user; and
a processor configured to execute the computer instructions.
7. The system of claim 6 , wherein at least one data category to which the requesting user has access is dependent on a time that the access request is received.
8. The system of claim 6 , wherein at least one data category to which the requesting user has access is based on a data access level indicating a maximum magnitude of data access to specific data entries within the at least one data category.
9. The system of claim 6 , wherein:
the base table comprises an encrypted representation of the data entries and the data categories; and
querying the base table comprises decrypting one or more of the encrypted data entries to access the plurality of data entries and corresponding data categories.
10. The system of claim 6 , wherein the one or more data categories correspond to business entities, organizational groups, class years, social circles, data types, data classes, security levels, or any combination thereof.
11. A method for database access control, comprising:
receiving an access request from a requesting user, the access request comprising user credentials identifying the requesting user and identifying requested data, the requesting user having access to one or more data categories;
generating based on the user credentials, a security table that identifies the one or more data categories to which the requesting user has access;
retrieving a candidate data entry table that maps data entries identified by the access request to one or more data categories, the categories including at least one category to which the user has access and at least one category to which the user does not have access;
performing a join operation between the security table and the candidate data entry table to generate a result set, each result in the result set comprising only those data entries within the candidate data entry table that are mapped to at least one data category included within the security table to which the user has access; and
providing the generated result set to the requesting user.
12. The method of claim 11 , wherein at least one data category to which the requesting user has access is dependent on a time that the access request is received.
13. The method of claim 11 , wherein at least one data category to which the requesting user has access is based on a data access level indicating a maximum magnitude of data access to specific data entries within the at least one data category.
14. The method of claim 11 , wherein the requested data is stored in a base table, the base table storing the requested data in an encrypted format, and wherein providing the generated result set of the requesting user comprises decrypting the requested data before providing the generated result set to the requesting user.
15. The method of claim 11 , wherein the one or more data categories correspond to business entities, organizational groups, class years, social circles, data types, data classes, security levels, or any combination thereof.
16. A database access control system, comprising:
a non-transitory computer-readable memory storing executable computer instructions, the instructions comprising instructions for:
receiving an access request from a requesting user, the access request comprising user credentials identifying the requesting user and identifying requested data, the requesting user having access to one or more data categories;
generating based on the user credentials, a security table that identifies the one or more data categories to which the requesting user has access;
retrieving a candidate data entry table that maps data entries identified by the access request to one or more data categories, the categories including at least one category to which the user has access and at least one category to which the user does not have access;
performing a join operation between the security table and the candidate data entry table to generate a result set, each result in the result set comprising only those data entries within the candidate data entry table that are mapped to at least one data category included within the security table to which the user has access; and
providing the generated result set to the requesting user; and
a processor configured to execute the computer instructions.
17. The system of claim 16 , wherein at least one data category to which the requesting user has access is dependent on a time that the access request is received.
18. The system of claim 16 , wherein at least one data category to which the requesting user has access is based on a data access level indicating a maximum magnitude of data access to specific data entries within the at least one data category.
19. The system of claim 16 , wherein the requested data is stored in a base table, the base table storing the requested data in an encrypted format, and wherein providing the generated result set of the requesting user comprises decrypting the requested data before providing the generated result set to the requesting user.
20. The system of claim 16 , wherein the one or more data categories correspond to business entities, organizational groups, class years, social circles, data types, data classes, security levels, or any combination thereof.
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