Patent ID: 11936795
Assignee: ORANGE
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 5:
6. A system for generating keys for an anonymous signature scheme, this system comprising:
at least one revocation entity comprising:
at least one first processor;
at least one first computer readable medium comprising first instructions stored thereon which when executed by the at least one first processor configure the at least one revocation entity to calculate a pair of revocation keys comprising a public key and a private key, said private key being usable by said at least one revocation entity to revoke anonymity of an anonymous signature complying with said anonymous signature scheme;

a group administration entity comprising:
at least one second processor;
at least one second computer readable medium comprising second instructions stored thereon which when executed by the at least one second processor configure the group administration revocation entity to register at least one member entity with a group;

said first instructions further configuring the at least one revocation entity to calculate, from the public key of said pair of revocation keys, a trace generator, said trace generator being intended to be used by each of the at least one member entity to generate a trace representative of said member entity, said trace being invariant relative to anonymous signatures generated by said member entity in accordance with said anonymous signature scheme; and
said at least one member entity, which comprises:
at least one third processor;
at least one third computer readable medium comprising third instructions stored thereon which when executed by the at least one third processor configure the at least member entity to blindly obtain a private group key, said private group key being used by said member entity to generate the anonymous signatures complying with said anonymous signature scheme, said anonymous signatures comprising said trace.