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中文摘要：
基于ACJT群盲签名和秘密共享技术提出了一个不需要其他可靠第三方的公平电子系统,拥有可疑货币的商店和发行该货币的银行在中央银行帮助下可联合运用Shamir秘密共享方案对用户进行追踪.为了预防敲诈、绑架等犯罪行为,新系统采用了一种新颖的方法对电子现金进行追踪：正常情形下,银行发行普通货币;而在敲诈、绑架等非正常情形下,银行发行具有标记的货币,在存款阶段,任何银行都可识别出该货币.另外,新系统与现实生活情形相符,是一个多银行系统,因而更具实用性.
英文摘要：
Different from the previous fair electronic cash systems which need another trusted third party besides the Central Bank to revoke the anonymity of a dishonest user, a new fair electronic cash system without other trustees is proposed based on ACJT group blind signature and Shamir＇s secret sharing scheme. A shop owningsuspicious e-coin and the bank having issued the coin can collaborate to find the user using secret sharing scheme with the help of the Central Bank, however, any one of them can＇t trace the user alone. Furthermore, we use a novel method to trace the e-coin： under normal situation, the bank issues ordinary e-coin, while under abnormal situation such as blackmailing, kidnapping etc. , the bank issues marked e-coin, and at the step of deposit, any bank in the group can recognize the marked e-coin. Also, our scheme is constructed for multiple banks as in the real life, thus it is more practical.
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