WO2005065358A3 - E-mail certification service - Google Patents

E-mail certification service Download PDF

Info

Publication number
WO2005065358A3
WO2005065358A3 PCT/US2004/043874 US2004043874W WO2005065358A3 WO 2005065358 A3 WO2005065358 A3 WO 2005065358A3 US 2004043874 W US2004043874 W US 2004043874W WO 2005065358 A3 WO2005065358 A3 WO 2005065358A3
Authority
WO
WIPO (PCT)
Prior art keywords
result
mail message
service
request
message
Prior art date
Application number
PCT/US2004/043874
Other languages
French (fr)
Other versions
WO2005065358A2 (en
Inventor
Peter S Avritch
Bruce M Clay
Molin James R Du
Original Assignee
First Information Systems Llc
Peter S Avritch
Bruce M Clay
Molin James R Du
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by First Information Systems Llc, Peter S Avritch, Bruce M Clay, Molin James R Du filed Critical First Information Systems Llc
Priority to US10/596,864 priority Critical patent/US20070143407A1/en
Publication of WO2005065358A2 publication Critical patent/WO2005065358A2/en
Publication of WO2005065358A3 publication Critical patent/WO2005065358A3/en

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q10/00—Administration; Management
    • G06Q10/10—Office automation; Time management
    • G06Q10/107—Computer-aided management of electronic mailing [e-mailing]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L51/00—User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/12—Applying verification of the received information
    • H04L63/123—Applying verification of the received information received data contents, e.g. message integrity

Abstract

A method is provided to handle an electronic mail message such that the receiver (106) of the e-mail message can verify the integrity of the message. A request (112) is provided from a sender's side (102) to a service. The request (112) includes information regarding the e-mail message. The service (104) processes at least a portion of the request (112) to generate a result (114). For example, the service (104) may encrypt the portion of the request (112), according to a public/private key encryption scheme, to generate a digital signature as the result (114). The service (104) provides the result (114) to the sender's side (102). At the sender's side (102), the result (114) is incorporated into the e-mail message (116) and the result-incorporated message is transmitted via an e-mail system (118). At the receiver's side (106), the result-incorporated e-mail message is processed (120) to access the integrity of the received e-mail message.
PCT/US2004/043874 2003-12-30 2004-12-28 E-mail certification service WO2005065358A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US10/596,864 US20070143407A1 (en) 2003-12-30 2004-12-28 E-mail certification service

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/749,911 2003-12-30
US10/749,911 US7653816B2 (en) 2003-12-30 2003-12-30 E-mail certification service

Publications (2)

Publication Number Publication Date
WO2005065358A2 WO2005065358A2 (en) 2005-07-21
WO2005065358A3 true WO2005065358A3 (en) 2006-10-05

Family

ID=34749312

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2004/043874 WO2005065358A2 (en) 2003-12-30 2004-12-28 E-mail certification service

Country Status (2)

Country Link
US (4) US7653816B2 (en)
WO (1) WO2005065358A2 (en)

Families Citing this family (97)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003041338A1 (en) * 2001-11-06 2003-05-15 International Business Machines Corporation Method and system for the supply of data, transactions and electronic voting
US8046832B2 (en) 2002-06-26 2011-10-25 Microsoft Corporation Spam detector with challenges
US7457955B2 (en) * 2004-01-14 2008-11-25 Brandmail Solutions, Inc. Method and apparatus for trusted branded email
US7653695B2 (en) * 2004-02-17 2010-01-26 Ironport Systems, Inc. Collecting, aggregating, and managing information relating to electronic messages
US7437169B2 (en) 2004-06-07 2008-10-14 Microsoft Corporation System and method for optimizing network communication in response to network conditions
US7783883B2 (en) * 2004-06-25 2010-08-24 Emc Corporation System and method for validating e-mail messages
US7996530B1 (en) 2004-11-15 2011-08-09 Bank Of America Corporation Method and apparatus for enabling authentication of on-line communications
US7584255B1 (en) * 2004-11-15 2009-09-01 Bank Of America Corporation Method and apparatus for enabling authentication of e-mail messages
US7603422B2 (en) * 2004-12-27 2009-10-13 Microsoft Corporation Secure safe sender list
US7599993B1 (en) 2004-12-27 2009-10-06 Microsoft Corporation Secure safe sender list
CA2493442C (en) * 2005-01-20 2014-12-16 Certicom Corp. Method and system of managing and filtering electronic messages using cryptographic techniques
US20070005702A1 (en) * 2005-03-03 2007-01-04 Tokuda Lance A User interface for email inbox to call attention differently to different classes of email
US8151112B2 (en) * 2005-04-22 2012-04-03 Gerard Lin Deliver-upon-request secure electronic message system
US7809357B2 (en) * 2005-05-20 2010-10-05 Microsoft Corporation System and method for optimizing network communication in response to network conditions
EP1905187A4 (en) * 2005-06-01 2011-08-17 Goodmail Systems Inc E-mail stamping with from-header validation
US7877789B2 (en) * 2005-06-01 2011-01-25 Goodmail Systems, Inc. E-mail stamping with from-header validation
US7917943B1 (en) * 2006-12-01 2011-03-29 Goodmail Systems, Inc. E-mail Stamping with accredited entity name
US8099465B2 (en) * 2005-06-07 2012-01-17 International Business Machines Corporation Method and system for preparing and replying to multi-party e-mails
US8874477B2 (en) 2005-10-04 2014-10-28 Steven Mark Hoffberg Multifactorial optimization system and method
US8065370B2 (en) 2005-11-03 2011-11-22 Microsoft Corporation Proofs to filter spam
US20070269041A1 (en) * 2005-12-22 2007-11-22 Rajat Bhatnagar Method and apparatus for secure messaging
JP2007180614A (en) 2005-12-26 2007-07-12 Canon Inc Transmitting device and receiver and method of controlling them, communication system, and program
US8364711B2 (en) * 2006-05-09 2013-01-29 John Wilkins Contact management system and method
US8028025B2 (en) * 2006-05-18 2011-09-27 International Business Machines Corporation Apparatus, system, and method for setting/retrieving header information dynamically into/from service data objects for protocol based technology adapters
US20070297408A1 (en) * 2006-06-22 2007-12-27 Jooyong Kim Message control system in a shared hosting environment
US20080005558A1 (en) * 2006-06-29 2008-01-03 Battelle Memorial Institute Methods and apparatuses for authentication and validation of computer-processable communications
US8484472B2 (en) * 2006-10-30 2013-07-09 Research In Motion Limited System and method of filtering unsolicited messages
US9390396B2 (en) * 2006-12-04 2016-07-12 Excalibur Ip, Llc Bootstrapping social networks using augmented peer to peer distributions of social networking services
US8224905B2 (en) * 2006-12-06 2012-07-17 Microsoft Corporation Spam filtration utilizing sender activity data
CA2574439A1 (en) * 2007-01-08 2008-07-08 Mark F. Van Coeverden De Groot Extended methods for establishing legitimacy of communications: precomputed demonstrations of legitimacy and other approaches
US8131745B1 (en) 2007-04-09 2012-03-06 Rapleaf, Inc. Associating user identities with different unique identifiers
US8103875B1 (en) * 2007-05-30 2012-01-24 Symantec Corporation Detecting email fraud through fingerprinting
JP5046158B2 (en) * 2007-08-10 2012-10-10 インターナショナル・ビジネス・マシーンズ・コーポレーション Apparatus and method for detecting characteristics of an e-mail message
US20090070866A1 (en) * 2007-09-11 2009-03-12 Erikson Glade Methods and systems for secure email transmissions
US20090106840A1 (en) * 2007-10-18 2009-04-23 Dreymann Daniel T Certification Of E-Mails With Embedded Code
US8136095B2 (en) * 2007-12-19 2012-03-13 Microsoft Corporation Relations in fuzzing data
US8286133B2 (en) * 2007-12-19 2012-10-09 Microsoft Corporation Fuzzing encoded data
US20090192881A1 (en) * 2008-01-28 2009-07-30 Pierre Joseph R Methods of advertising using digital stamps
US8146151B2 (en) 2008-02-27 2012-03-27 Microsoft Corporation Safe file transmission and reputation lookup
US9325528B2 (en) * 2008-03-20 2016-04-26 Iconix, Inc. System and method for securely performing multiple stage email processing with embedded codes
US8769702B2 (en) 2008-04-16 2014-07-01 Micosoft Corporation Application reputation service
FR2930392B1 (en) * 2008-04-22 2022-01-28 Trustseed METHOD AND DEVICE FOR SECURING DATA TRANSFERS
US8806590B2 (en) * 2008-06-22 2014-08-12 Microsoft Corporation Signed ephemeral email addresses
US8959053B2 (en) * 2008-08-13 2015-02-17 Alcatel Lucent Configuration file framework to support high availability schema based upon asynchronous checkpointing
US7614047B1 (en) 2008-08-21 2009-11-03 International Business Machines Corporation Change indication for a service offering
US9064021B2 (en) 2008-10-02 2015-06-23 Liveramp, Inc. Data source attribution system
US20100325228A1 (en) * 2009-06-23 2010-12-23 Alon Novy Systems and methods for distributed activity management system
US20110035317A1 (en) * 2009-08-07 2011-02-10 Mark Carlson Seedless anti phishing authentication using transaction history
JP5392627B2 (en) * 2010-09-30 2014-01-22 日本電気株式会社 Information processing method, information processing apparatus, control method thereof, and control program
US8990316B1 (en) * 2010-11-05 2015-03-24 Amazon Technologies, Inc. Identifying message deliverability problems using grouped message characteristics
US8819152B2 (en) * 2011-01-25 2014-08-26 Kristy Joi Downing Email addressee verification systems and methods for the same
US8726036B2 (en) * 2011-09-20 2014-05-13 Wallrust, Inc. Identifying peers by their interpersonal relationships
CN103260140B (en) * 2012-02-17 2018-03-16 中兴通讯股份有限公司 A kind of information filtering method and system
US8832443B2 (en) * 2012-05-31 2014-09-09 Daon Holdings Limited Methods and systems for increasing the security of private keys
US9818131B2 (en) 2013-03-15 2017-11-14 Liveramp, Inc. Anonymous information management
US10990686B2 (en) 2013-09-13 2021-04-27 Liveramp, Inc. Anonymous links to protect consumer privacy
US11157944B2 (en) 2013-09-13 2021-10-26 Liveramp, Inc. Partner encoding of anonymous links to protect consumer privacy
US9665883B2 (en) 2013-09-13 2017-05-30 Acxiom Corporation Apparatus and method for bringing offline data online while protecting consumer privacy
US10666590B2 (en) * 2013-10-21 2020-05-26 Dropbox, Inc. Secure sent message identifier
US10694029B1 (en) 2013-11-07 2020-06-23 Rightquestion, Llc Validating automatic number identification data
US10079791B2 (en) * 2014-03-14 2018-09-18 Xpedite Systems, Llc Systems and methods for domain- and auto-registration
US9553812B2 (en) * 2014-09-09 2017-01-24 Palo Alto Research Center Incorporated Interest keep alives at intermediate routers in a CCN
CN107210950A (en) 2014-10-10 2017-09-26 沐择歌有限责任公司 Equipment for sharing user mutual
US10560440B2 (en) 2015-03-12 2020-02-11 Fornetix Llc Server-client PKI for applied key management system and process
US10630686B2 (en) 2015-03-12 2020-04-21 Fornetix Llc Systems and methods for organizing devices in a policy hierarchy
US9665699B2 (en) * 2015-03-13 2017-05-30 Nxp B.V. Implementing padding in a white-box implementation
US10965459B2 (en) 2015-03-13 2021-03-30 Fornetix Llc Server-client key escrow for applied key management system and process
US10972422B2 (en) * 2015-05-21 2021-04-06 International Business Machines Corporation Presenting an electronic message
US10374997B2 (en) * 2015-08-26 2019-08-06 Min Zhuang System and method for spam prevention with generalized email address
US10372931B2 (en) 2015-12-27 2019-08-06 Avanan Inc. Cloud security platform
PL3188435T3 (en) * 2015-12-28 2020-05-18 Lleidanetworks Serveis Telemàtics S.A. Method for certifying an electronic mail comprising a trusted digital signature by a telecommunications operator
US10348485B2 (en) 2016-02-26 2019-07-09 Fornetix Llc Linking encryption key management with granular policy
US10860086B2 (en) 2016-02-26 2020-12-08 Fornetix Llc Policy-enabled encryption keys having complex logical operations
US11063980B2 (en) 2016-02-26 2021-07-13 Fornetix Llc System and method for associating encryption key management policy with device activity
US10917239B2 (en) 2016-02-26 2021-02-09 Fornetix Llc Policy-enabled encryption keys having ephemeral policies
US10880281B2 (en) 2016-02-26 2020-12-29 Fornetix Llc Structure of policies for evaluating key attributes of encryption keys
US10931653B2 (en) 2016-02-26 2021-02-23 Fornetix Llc System and method for hierarchy manipulation in an encryption key management system
EP3282664B1 (en) * 2016-08-08 2018-10-10 Virtual Solution AG Email verification
DE102016215914A1 (en) * 2016-08-24 2018-03-01 Siemens Aktiengesellschaft Securing a device usage information of a device
US10127160B2 (en) * 2016-09-20 2018-11-13 Alexander Gounares Methods and systems for binary scrambling
US9847973B1 (en) 2016-09-26 2017-12-19 Agari Data, Inc. Mitigating communication risk by detecting similarity to a trusted message contact
US11936604B2 (en) 2016-09-26 2024-03-19 Agari Data, Inc. Multi-level security analysis and intermediate delivery of an electronic message
US10805314B2 (en) 2017-05-19 2020-10-13 Agari Data, Inc. Using message context to evaluate security of requested data
US10880322B1 (en) 2016-09-26 2020-12-29 Agari Data, Inc. Automated tracking of interaction with a resource of a message
US10122734B2 (en) * 2016-11-29 2018-11-06 At&T Intellectual Property I, L.P. Secure email verification service
US10715543B2 (en) 2016-11-30 2020-07-14 Agari Data, Inc. Detecting computer security risk based on previously observed communications
US11044267B2 (en) 2016-11-30 2021-06-22 Agari Data, Inc. Using a measure of influence of sender in determining a security risk associated with an electronic message
US11722513B2 (en) 2016-11-30 2023-08-08 Agari Data, Inc. Using a measure of influence of sender in determining a security risk associated with an electronic message
US11019076B1 (en) * 2017-04-26 2021-05-25 Agari Data, Inc. Message security assessment using sender identity profiles
US11102244B1 (en) 2017-06-07 2021-08-24 Agari Data, Inc. Automated intelligence gathering
US11757914B1 (en) 2017-06-07 2023-09-12 Agari Data, Inc. Automated responsive message to determine a security risk of a message sender
US11601440B2 (en) * 2019-04-30 2023-03-07 William Pearce Method of detecting an email phishing attempt or fraudulent email using sequential email numbering
US20230412534A1 (en) * 2019-04-30 2023-12-21 William Michael Pearce Method of Detecting Incomplete Instant Messaging Record Sets using Sequential Numbering
US20230262040A1 (en) * 2019-04-30 2023-08-17 William Michael Pearce Method of Detecting Incomplete Electronic Record Sets using Sequential Numbering
US11587083B2 (en) 2019-12-11 2023-02-21 At&T Intellectual Property I, L.P. Transaction validation service
KR20220077109A (en) * 2020-11-30 2022-06-08 (주)기원테크 E-mail management methods and devices
US11528601B1 (en) 2021-06-09 2022-12-13 T-Mobile Usa, Inc. Determining and ameliorating wireless telecommunication network functionalities that are impaired when using end-to-end encryption

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6192130B1 (en) * 1998-06-19 2001-02-20 Entrust Technologies Limited Information security subscriber trust authority transfer system with private key history transfer
US20010037453A1 (en) * 1998-03-06 2001-11-01 Mitty Todd Jay Secure electronic transactions using a trusted intermediary with non-repudiation of receipt and contents of message
US20020059144A1 (en) * 2000-04-28 2002-05-16 Meffert Gregory J. Secured content delivery system and method
US20020144122A1 (en) * 2001-04-03 2002-10-03 S.W.I.F.T. System and method for facilitating trusted transactions between businesses
US6775382B1 (en) * 1997-06-30 2004-08-10 Sun Microsystems, Inc. Method and apparatus for recovering encryption session keys

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5619648A (en) 1994-11-30 1997-04-08 Lucent Technologies Inc. Message filtering techniques
US5926552A (en) * 1997-01-24 1999-07-20 Mckeon; Paul System and process for guaranteeing signatures on securities
US5944787A (en) * 1997-04-21 1999-08-31 Sift, Inc. Method for automatically finding postal addresses from e-mail addresses
US5877757A (en) * 1997-05-23 1999-03-02 International Business Machines Corporation Method and system for providing user help information in network applications
US5999967A (en) 1997-08-17 1999-12-07 Sundsted; Todd Electronic mail filtering by electronic stamp
US6490680B1 (en) * 1997-12-04 2002-12-03 Tecsec Incorporated Access control and authorization system
US6112227A (en) * 1998-08-06 2000-08-29 Heiner; Jeffrey Nelson Filter-in method for reducing junk e-mail
US6356937B1 (en) * 1999-07-06 2002-03-12 David Montville Interoperable full-featured web-based and client-side e-mail system
WO2001042966A2 (en) * 1999-12-13 2001-06-14 Novient, Inc. Attribute and application synchronization in distributed network environment
WO2002001783A2 (en) * 2000-06-27 2002-01-03 Peoplestreet, Inc. Systems and methods for managing contact information
JP2002163212A (en) * 2000-11-28 2002-06-07 Canon Inc Communication system, control method for it and medium
CA2374994C (en) * 2001-03-09 2007-05-15 Research In Motion Limited Wireless communication system congestion reduction system and method
WO2002093849A2 (en) * 2001-05-16 2002-11-21 Kasten Chase Applied Research Limited System for secure electronic information transmission
US7146009B2 (en) 2002-02-05 2006-12-05 Surety, Llc Secure electronic messaging system requiring key retrieval for deriving decryption keys
US7574737B1 (en) * 2002-05-31 2009-08-11 Novatel Wireless, Inc. Systems and methods for secure communication over a wireless network
CN1729476B (en) * 2002-10-18 2010-05-05 捷讯研究有限公司 Message settings selection
US9626655B2 (en) * 2004-02-19 2017-04-18 Intellectual Ventures I Llc Method, apparatus and system for regulating electronic mail

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6775382B1 (en) * 1997-06-30 2004-08-10 Sun Microsystems, Inc. Method and apparatus for recovering encryption session keys
US20010037453A1 (en) * 1998-03-06 2001-11-01 Mitty Todd Jay Secure electronic transactions using a trusted intermediary with non-repudiation of receipt and contents of message
US6192130B1 (en) * 1998-06-19 2001-02-20 Entrust Technologies Limited Information security subscriber trust authority transfer system with private key history transfer
US20020059144A1 (en) * 2000-04-28 2002-05-16 Meffert Gregory J. Secured content delivery system and method
US20020144122A1 (en) * 2001-04-03 2002-10-03 S.W.I.F.T. System and method for facilitating trusted transactions between businesses

Also Published As

Publication number Publication date
US8032751B2 (en) 2011-10-04
US20050188020A1 (en) 2005-08-25
US7653816B2 (en) 2010-01-26
US20070143407A1 (en) 2007-06-21
US20110314283A1 (en) 2011-12-22
WO2005065358A2 (en) 2005-07-21
US20100088385A1 (en) 2010-04-08

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