CA2426828A1 - Method and apparatus for delegating digital signatures to a signature server - Google Patents

Method and apparatus for delegating digital signatures to a signature server Download PDF

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Publication number
CA2426828A1
CA2426828A1 CA002426828A CA2426828A CA2426828A1 CA 2426828 A1 CA2426828 A1 CA 2426828A1 CA 002426828 A CA002426828 A CA 002426828A CA 2426828 A CA2426828 A CA 2426828A CA 2426828 A1 CA2426828 A1 CA 2426828A1
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Canada
Prior art keywords
user
signature server
item
request
server
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA002426828A
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French (fr)
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CA2426828C (en
Inventor
Vipin Samar
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Oracle International Corp
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Individual
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Publication date
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Publication of CA2426828A1 publication Critical patent/CA2426828A1/en
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Publication of CA2426828C publication Critical patent/CA2426828C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • G06F21/64—Protecting data integrity, e.g. using checksums, certificates or signatures
    • G06F21/645—Protecting data integrity, e.g. using checksums, certificates or signatures using a third party
    • 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

Abstract

One embodiment of the present invention provides a system that facilitates delegating operations involved in providing digital signatures to a signature server. The system operates by receiving a request for a digital signature from a user at the signature server, wherein the request includes an item to be signed on behalf of the user by the signature server. In response to the request, the system looks up a private key for the user at the signature server, and signs the item with the private key. Next, the system returns the signed item to the user, so that the user can send the signed item to the recipient. In one embodiment of the present invention, the system authenticates the user prior to signing the item. In one embodiment of the present invention, the system determines whether the user is authorized to sign the item prior to signing the item.

Claims (33)

1. A method for facilitating the delegation of operations involved in providing digital signatures to a signature server, the method comprising:
receiving a request for a digital signature from a user at the signature server, the request including an item to be signed on behalf of the user by the signature server;
looking up a private key for the user at the signature server;
signing the item with the private key for the user; and returning the signed item to the user so that the user can send the signed item to a recipient.
2. The method of claim 1, wherein prior to signing the item, the method further comprises authenticating the user.
3. The method of claim 2, wherein prior to signing the item, the method further comprises determining whether the user is authorized to sign the item.
4. The method of claim 3, wherein determining whether the user is authorized to sign the item involves looking up an authorization for the user based upon an identifier for the user as well as an identifier for an application to which the user will send the signed item.
5. The method of claim 3, wherein determining whether the user is authorized to sign the item involves communicating with an authority server that is separate from the signature server.
6. The method of claim 1, further comprising allowing the user to authenticate the signature server prior to sending the request to the signature server.
7. The method of claim 1, further comprising facilitating encryption of communications between the user and the signature server.
8. The method of claim 1, wherein the method further comprises configuring the signature server to accommodate a new user by:
receiving a request from an authorized entity to add the new user;
generating a key pair for the new user, including a new user private key and a new user public key;
communicating with a certification authority to obtain a certificate for the new user based on the key pair; and storing the certificate and the key pair for the new user in a location that is accessible by the signature server to enable the signature server to sign items on behalf of the new user.
9. The method of claim 1, wherein the method further comprises configuring the signature server to delete an old user by:
receiving a request from an authorized entity to delete the old user;
notifying a certification authority to revoke a certificate for the old user;
and removing the private key for the old user from the signature server, so that the signature server can no longer sign items on behalf of the old user.
10. The method of claim 1, wherein the method further comprises archiving the request and the signed item at the signature server.
11. The method of claim 1, wherein the method further comprises forwarding the signed item to an archive server in order to be archived.
12. A computer-readable storage medium storing instructions that when executed by a computer cause the computer to perform a method for facilitating the delegation of operations involved in providing digital signatures to a signature server, the method comprising:
receiving a request for a digital signature from a user at the signature server, the request including an item to be signed on behalf of the user by the signature server;
looking up a private key for the user at the signature server;
signing the item with the private key for the user; and returning the signed item to the user so that the user can send the signed item to a recipient.
13. The computer-readable storage medium of claim 12, wherein prior to signing the item, the method further comprises authenticating the user.
14. The computer-readable storage medium of claim 13, wherein prior to signing the item, the method further comprises determining whether the user is authorized to sign the item.
15. The computer-readable storage medium of claim 14, wherein determining whether the user is authorized to sign the item involves looking up an authorization for the user based upon an identifier for the user as well as an identifier for an application to which the user will send the signed item.
16. The computer-readable storage medium of claim 14, wherein determining whether the user is authorized to sign the item involves communicating with an authority server that is separate from the signature server.
17. The computer-readable storage medium of claim 12, wherein the method further comprises allowing the user to authenticate the signature server prior to sending the request to the signature server.
18. The computer-readable storage medium of claim 12, wherein the method further comprises facilitating encryption of communications between the user and the signature server.
19. The computer-readable storage medium of claim 12, wherein the method further comprises configuring the signature server to accommodate a new user by:
receiving a request from an authorized entity to add the new user;
generating a key pair for the new user, including a new user private key and a new user public key;
communicating with a certification authority to obtain a certificate for the new user based on the key pair; and storing the certificate and the key pair for the new user in a location that is accessible by the signature server to enable the signature server to sign items on behalf of the new user.
20. The computer-readable storage medium of claim 12, wherein the method further comprises configuring the signature server to delete an old user by:
receiving a request from an authorized entity to delete the old user;
notifying a certification authority to revoke a certificate for the old user;
and removing the private key for the old user from the signature server, so that the signature server can no longer sign items on behalf of the old user.
21. The computer-readable storage medium of claim 12, wherein the method further comprises archiving the request and the signed item at the signature server.
22. The computer-readable storage medium of claim 12, wherein the method further comprises forwarding the signed item to an archive server in order to be archived.
23. An apparatus that facilitates delegating operations involved in providing digital signatures, comprising:
a signature server;
a receiving mechanism within the signature server that is configured to receive a request for a digital signature from a user, the request including an item to be signed on behalf of the user by the signature server;
a lookup mechanism within the signature server that is configured to look up a private key for the user;
a signing mechanism within the signature server that is configured to sign the item with the private key for the user; and a sending mechanism within the signature server that is configured to return the signed item to the user so that the user can send the signed item to a recipient.
24. The apparatus of claim 23, further comprising an authentication mechanism that is configured to authenticate the user prior to signing the item.
25. The apparatus of claim 24, further comprising an authorization mechanism that is configured to determine whether the user is authorized to sign the item prior to signing the item.
26. The apparatus of claim 25, wherein the authorization mechanism is configured to determine whether the user is authorized to sign the item by looking up an authorization for the user based upon an identifier for the user as well as an identifier for an application to which the user will send the signed item.
27. The apparatus of claim 25, wherein the authorization mechanism is configured to determine whether the user is authorized to sign the item by communicating with an authority server that is separate from the signature server.
28. The apparatus of claim 23, further comprising an authentication mechanism that is configured to allow the user to authenticate the signature server prior to sending the request to the signature server.
29. The apparatus of claim 23, further comprising an encryption mechanism that is configured to facilitate encryption of communications between the user and the signature server.
30. The apparatus of claim 23, further comprising an initialization mechanism that is configured to:
receive a request from an authorized entity to add a new user;
generate a key pair for the new user, including a new user private key and a new user public key;
communicate with a certification authority to obtain a certificate for the new user based on the key pair; and to store the certificate and the key pair for the new user in a location that is accessible by the signature server to enable the signature server to sign items on behalf of the new user.
31. The apparatus of claim 23, further comprising a deletion mechanism that is configured to:
receive a request from an authorized entity to delete an old user;
notify a certification authority to revolve a certificate for the old user;
and to remove the private key for the old user from the signature server, so that the signature server can no longer sign items on behalf of the old user.
32. The apparatus of claim 23, further comprising an archiving mechanism that is configured to archive the request and the signed item at the signature server.
33. The apparatus of claim 23, further comprising an archiving mechanism that is configured to forward the signed item to an archive server in order to be archived.
CA2426828A 2000-12-15 2001-12-11 Method and apparatus for delegating digital signatures to a signature server Expired - Lifetime CA2426828C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/741,691 2000-12-15
US09/741,691 US7210037B2 (en) 2000-12-15 2000-12-15 Method and apparatus for delegating digital signatures to a signature server
PCT/US2001/048266 WO2002048848A2 (en) 2000-12-15 2001-12-11 Method and appartus for delegating digital signatures to a signature server

Publications (2)

Publication Number Publication Date
CA2426828A1 true CA2426828A1 (en) 2002-06-20
CA2426828C CA2426828C (en) 2011-01-25

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CA2426828A Expired - Lifetime CA2426828C (en) 2000-12-15 2001-12-11 Method and apparatus for delegating digital signatures to a signature server

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US (1) US7210037B2 (en)
EP (1) EP1402330B1 (en)
JP (1) JP4283536B2 (en)
AU (2) AU3662202A (en)
CA (1) CA2426828C (en)
WO (1) WO2002048848A2 (en)

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US7210037B2 (en) 2007-04-24
CA2426828C (en) 2011-01-25
AU3662202A (en) 2002-06-24
EP1402330B1 (en) 2017-07-26
WO2002048848A3 (en) 2003-12-24
WO2002048848A2 (en) 2002-06-20
US20020078355A1 (en) 2002-06-20
JP2005502217A (en) 2005-01-20
EP1402330A2 (en) 2004-03-31
AU2002236622B2 (en) 2007-08-09
JP4283536B2 (en) 2009-06-24

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