A Semi-quantum Group Signature Scheme Based on Bell States

摘要

In this paper, we propose a group signature scheme based on Bell states, which restricts the group member Alice to transmit the signature message to a fully quantum ability group manager TP through semi-quantum communication, then TP sends the signature message to an outsider verifier Bob to verify the signature. The signature message is sent by TP which can ensure Alice's anonymous in group signature scheme. Besides, the limited Alice is a "classic" user in semi-quantum communication and can only measure, prepare, reorder and send quantum states only in the classical basis {|0>, |1>}, while the quantum TP can perform arbitrary quantum operations. Besides, the "classical" user Alice does not require quantum memory. Finally, the security analysis shows that the scheme can not only resist the repudiation of the signer and denial of the verifier, but also detect the forgery of the attacker, and the efficiency of the scheme is slightly higher than most of the previous signature schemes.