Efficient identity-based proxy blind signature

With proxy signature, an original signer can entrust his signing authority to a proxy signer. In blind signature scheme, a message and the signature result was unknown to the signer. An efficient identity-based proxy blind signature scheme was proposed by using bilinear pairings and combining proxy signature with blind signature. Analysis shows that the proposed scheme can satisfy all the required properties of a proxy blind signature. Furthermore, its efficiency is also better than that of the existing ones.