In this paper we propose a secure and efficient off-line electronic transaction protocol based on an IDbased public key encryption system and group signature schemes, which is constructed from bilinear pairings. The anonymity of the customer is revocable by a trustee in case of dispute. Because the amount of communication in the payment protocol is about 1280 bits, our off-line electronic transaction protocol can be used in the wireless networks with the limited bandwidth or the limited-storage environment such as smart card.
Cryptography, protocol, electronic cash system, bilinear pairings, group signatures.
Constantin Popescu, "A Secure and Efficient Off-line Electronic Transaction Protocol", Studies in Informatics and Control, ISSN 1220-1766, vol. 19(1), pp. 27-34, 2010. https://doi.org/10.24846/v19i1y201003
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