A Novel Signer-Admission Ring Signature Scheme from Bilinear Pairings

In this paper, we presented a novel ring signature scheme in which the actual signer has the ability to admit having signed a document at his will. It´s an extension and improvement of the ring signature suggested by Rivest et al. in 2001. This extended ring signature is valuable in real-life application. An actual signer may possibly want to expose himself if he will acquire enormous benefit. Based on bilinear pairings, a novel signer-admission ring signature scheme is presented. It satisfies the properties: anonymity, unforgeability, non-transferable.