面向航空差旅消费的可监管交易隐私保护方案

Supervisable transaction privacy-preservation scheme for air travel consumption

针对航空差旅消费的潜在隐私泄露风险,提出一种可监管的交易隐私保护密码学方案,为航空公司、集团客户和差旅人员三方交易提供安全保障。通过在交易密文中额外添加一位接收方公钥,双接收方能够独立解密并获得相同的交易信息,确保了作为额外接收方的监管者能够分布式审查航空公司和集团客户之间的真实交易金额;通过设计同态加密算法,密文交易数据可以被正常分析,而隐藏的交易额可以通过零知识证明协议保证其正确性。实验分析表明,在添加了一位接收方的情况下,依然保持较高的执行效率。该方案不仅增加了交易系统的监管功能,还可解决航空差旅交易中隐私保护与精准核算的内在冲突。

In view of the potential privacy leakage risk of air travel consumption,this paper proposed a supervisable privacy-preservation cryptography scheme.It guaranteed security for the transaction among airlines,group customers and business passengers.By adding an additional recipient’s public key to the transaction ciphertext,the dual recipients could independently decrypt and obtain the same transaction information.The scheme ensured that the supervisor as the additional recipient could review the real transaction amount between the airline and the group customer.By designing the homomorphic encryption algorithm,the ciphertext transaction data in circulation could be analyzed normally,and the hidden transaction amount could be guaranteed by the zero-knowledge proof protocol.The experimental analysis shows that the scheme adds one more recipient without increasing the computational complexity.Not only the scheme increases the supervision function of the air transaction system,but also solves the internal conflicts between privacy-preservation and accurate audit faced by air business transaction.