Fair Electronic Cash Systems with Multiple Banks
نویسندگان
چکیده
We propose a model for fair electronic cash issued by multiple banks for the first time. A scheme of electronic cash with multiple banks in which a user can be traced is presented by using the improved group signature scheme of Cam97[4] and the group blind signature scheme of Lys98[16]. A weakness in the design of withdrawal and payment protocols of electronic cash using the existing group signature schemes is pointed out with its reasons analyzed. In addition a way of disposing it is given.
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