An Anonymous but Accountable Proxy Multisignature Scheme

摘要

In a proxy multi-signature, the proxy signer cansign a message on behalf of more than one original signer.However, in some cases, the proxy or the original signers donot want to leak the proxy signer's identity. In addition,when something is wrong with the signed message, theidentity of the proxy signer has to be revealed. So theproblem of anonymous but accountable has been proposed.Using the technology of pseudonym and secret sharing, inthis paper, a simple method was proposed to reach thetarget of anonymous but accountable. In the scheme, theidentity of the proxy signer was anonymous, but when t ormore original signers want to reveal the proxy signer'sidentity, the proxy signer’s identity would be revealed andbe demonstrated.