A Dynamic Anonymous Authentication Scheme with Identity Escrow

A new anonymous authentication scheme with traceable identity is proposed. This scheme has the following advantages: (1) It is easy for users to dynamically join and leave, the only thing needs to do is manager add or delete the relevant data of users. (2) The prover can unrestrictedly choose a group of users and declare that himself belong to it, so he can choose his anonymous scope initiatively and freely. (3) In the process of trace the identity of prover, the right of manager is restricted, he needs cooperation with the verifiers to reveal the identity of the prover. In the aspect of against outside attack and masking attack, compared with the scheme 1-resilient of Boneh(1999), this scheme can realize arbitrary resilience .