An Efficient ID-Based Restrictive Partially Blind Signature Scheme

Many restrictive partially blind signatures have been proposed till now. But all existing restrictive partially blind signature schemes were constructed under certificate-based public key systems. Recently, Chen et al. proposed the first ID-based restrictive partially blind signature from bilinear pairings. However, the computational cost of their scheme is high. In this paper, we propose a new ID-based restrictive partially blind signature scheme. We analyze its efficiency and security. We claim that our scheme is simpler and more efficient than Chen et al.´s scheme. It also is provably secure in the random oracle model.