可搜索加密技术在金融交易行为中的应用  

Application of Searchable Encryption Technology into Financial Transaction Behaviors

作　　者：刘宇琛 张留学 LIU Yuchen;ZHANG Liuxue(School of Economics and Management,Changsha University of Science and Technology,Changsha 410114,China;Changsha Niwa Digital Technology Co.,Ltd.,Changsha 410005,China)

机构地区：[1]长沙理工大学经济与管理学院,湖南长沙410114 [2]长沙泥娃数字科技有限公司,湖南长沙410005

出　　处：《湖南科技大学学报（自然科学版）》2024年第3期116-124,共9页Journal of Hunan University of Science And Technology：Natural Science Edition

摘　　要：针对金融交易行为信息管理的安全问题,基于同态加密算法的原理,研究了分离码编解码、路径散列消息摘要和语义树索引算法.在此基础上,利用分离码编解码算法作为同态加密的加解密手段,结合路径散列消息摘要算法、语义树索引算法,构建金融交易行为信息的安全存储方法及密文搜索系统.结果表明:利用分离码分组编码算法将信息转换为变换序列和位数序列,可以实现用密文建立全文检索;通过信息分组、路径散列计算、结果序列调和散列,结合输出字符串的设定,提出不可逆消息摘要的生成方法;基于语句的索引算法,采用密文搜索和原来语句搜索的一致性原则,构建密文搜索系统;构建的全文暨密文检索系统,可以实现密文的快速、安全检索,能够保证用户交易行为的数据、隐私、计算和分析的安全.Addressing the security issues in the information management of financial transaction behaviors,this paper investigates the Separating Codec,Path Hash Message Digest,and Semantic Tree Indexing Algorithms based on the principles of Homomorphic Encryption Algorithms.Building upon this research,the Separating Codec Algorithm is employed as the encryption and decryption method for homomorphic encryption,integrated with the Path Hash Message Digest algorithm and Semantic Tree Indexing algorithm,to construct a secure storage method and ciphertext search system for financial transaction behavior information.Results indicate that by utilizing a Separating Codec Block Coding Algorithm to convert information into a transformation sequence and a bit sequence,it is feasible to establish a full-text search capability by using ciphertexts.Furthermore,an irreversible message digest generation method is proposed through information grouping,path hashing computation,result sequence modulation and hashing,in conjunction with the setting of output strings.Based on the sentence-level indexing algorithm,a ciphertext search system is constructed by adopting the consistency principle between ciphertext search and original sentence search.The constructed full-text and ciphertext retrieval system can achieve fast and secure retrieval of ciphertexts,ensuring the security of user transaction data,privacy,computation,and analysis.

关 键 词：金融交易行为 可搜索加密 分离编解码 密文检索 语义树搜索 

分 类 号：TP393.08[自动化与计算机技术—计算机应用技术]