METHOD FOR ACCESSING A SERVICE OF A SERVICE PROVIDER BY PROVIDING ANONYMOUSLY AN ATTRIBUTE OR A SET OF ATTRIBUTES OF A USER

摘要

The invention relates to a method Method for accessing a service (S) of a service provider (SP 3) by providing anonymously an attribute or a set of attributes of a user determined and stored in an attribute provider (AP 2), comprising a step of processing pairs of public and private keys (K_S,K_P) of said user in a secure element (SE 1), each public key being used used once and for one set of attributes only for characterised in that it comprises - receiving (S5) by the service provider from the secure element a certificate (C_APK_P) delivered by the attribute provider, and a list (LA[^Y₀]) of attribute values (A_Y) associated to random values (RandomY) in response to a list of attribute requests (L[^Y₀]); - determining (S6) by the service provider, digest codes (Di_Y) associated to said list (LA[^Y₀]) of attribute values (A_y) and corresponding random values (Random_Y), wherein Di_Y=SHA-2 (Random_y, A_Y), - extracting data (CAL) from said certificate (C_APK_P), accessing to said service (S) if said determined digest codes (Di_Y)are included into said extracted data (CAL).