Independent verification of proxy multi-signature scheme

Privacy has become one of the most important human rights of the modern age. To our knowledge, in order to verify the validity of the proxy multi-signature, the verifier needs to get all the original signers’ public keys together. Obviously, the verification would leak the relationships between the proxy signer and the original signers. In this paper, we propose a special secure proxy multi-signature scheme which can be used in the scene: the proxy signer hopes to make the verifier verify the signature with only the special original signers’ public keys while keeping other delegations secret. After the proxy signer finished a proxy multi-signature, others can verify it using the public keys of the special original signers, rather than collecting all the original signers’ public keys. We call the scheme the independent verification of proxy multi-signature (IVPMS) scheme.