Decentralized Group Signature Scheme Based on Blockchain

The group signature scheme is widely used in military and financial fields due to its efficient anonymity and revocability. However, in an untrusted environment, previous group signature schemes often suffer joint attacks from management centers or revocation centers, which reduces the security of the scheme. At the same time, the malicious group center and the signature recipient can identify the signer identity and also threaten the anonymity of the program. It is proved by calculation that the scheme can maintain the security and anonymity of the group signature algorithm in an untrusted environment.