METHOD AND SYSTEM WITH AUTHENTICATION, REVOCABLE ANONYMITY AND NON-REPUDIATION

摘要

The invention relates to a method of accessing a service. The inventive method consists in: (i) identifying and registering a Client (C), (ii) authenticating the Client with an Anonymous Certification Authority, (iii) authenticating the Client through the production of an anonymous signature and opening and maintaining an anonymous authentication session with a Server (Se) and (iv) selectively enabling a contact between the Server (Se) and the Anonymous Certification Authority (ACA) in order to remove the anonymity of the Client (C) on the basis of the signature supplied in step (iii). The invention also relates to a system of opening and maintaining an authentication session which guarantees non-repudiation.