Blind Proxy Blind Signature Scheme Based on Elliptic Curve

To solve the contradiction that current signature schemes can not protect the benefits of proxy signer and message owner at the same time,a blind proxy blind signature scheme without trusted party base on elliptic curve is presented.It hides both the identity of the proxy signer and the message to be signed.The property analysis shows that the proposed scheme satisfies the security properties of proxy blind signature and blind proxy signature scheme.It can effectively protect the proxy signer and user's identity privacy and prevents abusing signature.It also has a higher safety and efficiency compared with other schemes.