vMixing coins strategy can realize the anonymity of user information, thereby protecting the user's privacy. Ideally, the blacklist is public information and all bad coins are recorded in it. However, due to the failure of some bad coins to be registered in the blacklist in time, users can only obtain part of the blacklist information, which allows illegal criminals to take advantage of it. How to prevent illegal activities under the partial information blacklist and how to design coins' quality updating rule rationally have become open issues in mixing coins. The updating rule of coins' quality in mixing is addressed since illegal criminals may carry out illegal activities, for example, money laundering. ImpSuic, an improved suicide strategy, is proposed as a new quality updating rule. The intuition is: all coins of the one who has the highest bad coins according to the blacklist, are recorded as bad coins. On the other hand, the coins' quality of others remain unchanged. Besides, linear programming is introduced into ImpSuic strategy to predict the maximum utility after mixing coins, which facilitates users to make reasonable decisions before mixing coins. Simulation results show that the quality updating rule in ImpSuic strategy can preserve users' privacy and antimoney launder.

中文翻译：

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ImpSuic：混合硬币和最大效用时的质量更新规则

vMixing硬币策略可以实现用户信息的匿名性，从而保护用户的隐私。理想情况下，黑名单是公共信息，所有坏硬币都记录在其中。但是，由于一些不良硬币未能及时在黑名单中进行注册，用户只能获取部分黑名单信息，这使非法罪犯可以利用该黑名单信息。如何防止部分信息黑名单下的非法活动，以及如何合理设计硬币的质量更新规则，已经成为混合硬币过程中的公开问题。由于非法罪犯可能进行非法活动（例如洗钱），因此解决了混合硬币质量的更新规则。ImpSuic是一种改进的自杀策略，被提议作为一种新的质量更新规则。直觉是：根据黑名单，具有最高坏硬币的一个的所有硬币都记录为坏硬币。另一方面，其他硬币的质量保持不变。此外，ImpSuic策略中引入了线性编程来预测混合硬币后的最大效用，这有助于用户在混合硬币之前做出合理的决定。仿真结果表明，ImpSuic策略中的质量更新规则可以保护用户的隐私和反洗钱。