Proxy structured multisignature scheme from bilinear pairings

In the past few years, proxy signatures have become an important research area and many excellent schemes have been proposed. Proxy signatures can combine other special signatures to obtain some new types of proxy signatures. A multisignature scheme is said to be structured if the group of signers is structured. Due to the various applications of the bilinear pairings in cryptography, many pairing-based signature schemes have been proposed. In this paper, we propose a proxy structured multisignature scheme from bilinear pairings. This scheme provides a possible solution to the problem that ordinary structured multisignature relies on the presence and cooperating of all the entities of the signing group. We support the proposed scheme with security and efficiency analysis.