A Blind Proxy Re-signatures Scheme Based on Standard Model

The proposed proxy re-signature schemes had no message blinded properties as yet, so there is a problem that they can not protect the original signers privacy. The general proxy re-signature scheme is extended using the idea of blind signature. The definition of blind proxy re-signature scheme been given firstly; then according to the definition, the blind proxy re-signatures scheme Based on Standard Model is proposed using of bilinear mapping technology and standard model framework proposed by Waters, finally, the security of the scheme is proven. The transparent signature conversion from original signer to proxy re-signer is achieved in this paper which can protect the original signers privacy, at the same time, the scheme is practicality as it is designed using the framework of standard model.