【摘要】 CoinParty是目前区块链中最为流行的隐私保护技术之一，由于其引入了第三方节点进行混币，存在安全风险；又由于其通过节点之间的传递校验份额进行校验和检验最终地址，导致效率低下。基于此，为了解决CoinParty存在的安全性和效率问题，提出了ShuffleParty,一种无第三方节点，完全分散的混币机制。首先，将所有的混币节点生成一个由每个参与者控制的托管地址，将需要混币的金额发送到托管地址中；然后，随机选出多个洗牌节点，将自己的混币交易输出地址用洗牌节点的公钥进行层层加密，交给洗牌节点进行层层解密和洗牌；最后，一个洗牌节点获得了完整的明文地址列表后，将地址列表广播给普通混合者进行验证，并生成共同最终置换。通过安全分析和实验表明，ShuffleParty安全性优于CoinParty,并且混币效率也高于CoinParty。更多还原

【Abstract】 CoinParty is one of the most popular privacy protection technologies in the block chain at present. Because it introduces third-party nodes to mix currencies, there are security risks. It is also inefficient because it uses checksum to check the final address by passing the share of checks between nodes. Based on this, in order to solve the security and efficiency problems of CoinParty, we propose ShuffleParty, a fully dispersed currency mixing mechanism without third-party nodes. All the mixed currency nodes are generated into a managed address controlled by each participant. The amount of the mixed currency needed is sent to the managed address. Then several shuffle nodes are randomly selected, the output address of the mixed currency transaction is encrypted layer by layer with the public key of the shuffle nodes, and give it to the shuffle nodes for decryption layer by layer and mixing. Finally, the address list is given to the ordinary mixers for verification, and the common final replacement is generated. The security analysis and experiments show that ShuffleParty is safer than CoinParty, and the efficiency of coin mixing is also higher than CoinParty.更多还原