List e.g. electoral list, signaturing method for e.g. electronic voting field, involves providing data by member, where data is function of secret key and independent of identifier, and implementing secret keys without revealing keys

摘要

#CMT# #/CMT# The method involves defining a cryptographic element relative to a list for a confidence entity (1). A secret key is defined, and a certificate is received from the authority by a member (Mi) of the list. A sequence identifier to be used by the member of the list is provided. Data is provided by the member. The data has authentication element for determining anonymous data of the member using the identifier more than one time. The anonymous data is the function of the key and independent of the identifier. The key and another secret key are implemented without revealing the keys. #CMT# : #/CMT# Independent claims are also included for the following: (1) a computer program comprising instructions for implementing a list signaturing method (2) a removable data storage medium comprising computer program code instructions for implementing the list signaturing method. #CMT#USE : #/CMT# Method for signaturing a list e.g. electoral list, in a field of electronic voting, electronic petition and anonymous electronic signature for electronic bidding applications. #CMT#ADVANTAGE : #/CMT# The method permits detection of ulterior votes of a voter previously identified as fraud while conserving degree of anonymity required for the voting application, thus preventing fraudulence. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a block diagram of a system implementing a list signature method. Mi : Member R : Communication network 1 : Confidence authority 2 : Verifier entity 3 : Authorized authority.