Method and device for anonymous signature with a shared...

Details Method and device for anonymous signature with a shared... Method and device for anonymous signature with a shared...

2002-12-13

2009-08-04

Smithers, Matthew B (Department: 2437)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C713S156000, C713S163000, C713S170000, C726S004000, C726S005000, C726S006000, C380S028000

Reexamination Certificate

active

07571324

ABSTRACT:
A cryptographic method and apparatus for anonymously signing a message. Added to the anonymous signature is another signature which is calculated (operation13) using a private key common to all the members of a group authorized to sign and unknown to all revoked members. The private key is updated (operations8, 11) at group level on each revocation within the group and at member level only on anonymous signing of a message by the member.

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