Threshold attribute based universal designated verifier signature scheme in the standard model

In universal designated verifier signature scheme, signature holder can designate the signature to any desired designated verifier. Only the designated verifier can believe that the signature holder does have a valid publicly verifiable signature. Attribute based encryption is a novel public key primitive in cryptography and attribute based signature can provide a powerful way for users to control their privacy. In this paper, we propose a threshold attribute based universal designated verifier signature scheme whose security can be proven in the standard model. The security of our scheme depends on the Bilinear Diffie-Hellman (BDH) assumption. Key–Words: Bilinear pairings, Attribute-based, Universal designated verifier signature, Provable secure