Abstract:

Hidden authentication conditional oblivious transfer based on oblivious attribute credentials(OACerts) and hidden credentials is proposed and a scheme based on bilinear pairing for implementing the idea is constructed which solves the problem that OACerts may exposure some sensitive information of the receiver. The scheme proposed has the property that only the receiver who has the required attribute credentials can open the message corresponding to its attribute value and that the receiver need not provide to the sender any credentials. The sender can not decide whether or not the receiver can open the messages and which message he can open.

Key words: oblivious attribute credentials, bilinear pairing, conditional oblivious transfer, hidden credentials