Selectively Traceable Anonymous and Unlinkable Token-Based Transactions

摘要: In this paper we propose an approach that provides a means for users to conduct transactions with service provider such those can neither be linked specific user nor together. However, sure only authorized are able transactions. Our construction combines the concepts of anonymous authentication from public-key encryption, based on novel paradigm denoted as post-active anonymity, and well unlinkable token blind signature schemes. Thereby, takes advantages both concepts. Furthermore, in privacy-preserving protocols, unconditional anonymity is usually not desirable. Thus, provide mechanism revoke misbehaving behind case suspicion. More precisely, realize selective traceability using ideas searchable encryption. This allows revocation suspicious along identification all their without violating privacy remaining users.