An Efficient ID - based Proxy Blind Signature with Pairing - free Realization
نویسندگان
چکیده
Proxy blind Signature allows an original signer to delegate his/her signing capability to a proxy signer who performs message signing blindly on behalf of original signer but he cannot make any link between the blind signature and the identity of the message's owner. Using bilinear pairings, so many ID-based proxy blind signature (IDPBS) schemes have been proposed. But the computation cost of a pairing is realized very high now a days. On the other hand, map to point hash function is used very frequently in the pairing based schemes that is another very expensive primitive. Therefore we propose an efficient PBS scheme without pairings in the ID-based setting that is provable secure. With the pairing-free realization, our proposed scheme is much efficient as well as applicable than existing schemes. Keywords—Digital signature, Identity-based cryptography, Proxy-blind signature, Elliptic curve cryptography, Provable security
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