E-Cash System for Multiple Banks Based on Restrictive Proxy Blind Signature
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摘要: 为克服基于群签名思想的多银行电子现金的不足,并提高效率,把盲签名的限制性假设与代理盲签名结合,提出了限制性代理盲签名的概念.根据此概念可构造多个银行参与发行的、公正的电子现金系统.在正常情况下,合法用户的匿名性得到保护,在特殊情况(如法律强制要求)下,发币银行在中央银行的帮助下,可以撤销用户的匿名性.Abstract: To overcome the shortcomings of a multi-bank system based on group signature and improve efficiency,a concept called restrictive proxy blind signature was proposed,in which the restrictive assumption in blind signature was added to proxy blind signature.A fair off-line e-cash system for multiple banks can be implemented based on the restrictive proxy blind signature.The user’s anonymity is protected under normal conditions,and it can be revoked by the issuing bank under the supervision of the central bank if anything abnormal happens(such as requirement by law).
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Key words:
- electronic cash system /
- multiple bank /
- proxy signature /
- proxy blind signature /
- restrictness
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