基于Paillier公钥密码体制的低频分词密文索引方案  

A Low Frequency Participle Ciphertext Index Scheme Based on Paillier Public Key Cryptosystem

作　　者：廖祥宇 郑明辉 朱小强 LIAO Xiangyu;ZHENG Minghui;ZHU Xiaoqiang(School of Information and Engineering,Hubei Minzu University,Enshi 445000,China)

机构地区：[1]湖北民族大学信息工程学院,湖北恩施445000

出　　处：《湖北民族大学学报（自然科学版）》2020年第4期408-410,共3页Journal of Hubei Minzu University:Natural Science Edition

基　　金：国家自然科学基金项目(61772181);湖北省创新群体项目(2016CFA021).

摘　　要：针对云环境中密文在数据库检索的效率问题,提出了一种基于Paillier公钥算法的低频分词索引方案.首先利用Paillier分词选取出每段权重最低的低频分词并进行Paillier处理,将Paillier处理后的结果作为密文检索的索引,然后利用Paillier配对算法对整段明文进行加密,最后部署在数据库中进行效率测试.测试结果表明该方案能有效地提高密文在数据库中的检索效率.Aiming at the efficiency of ciphertext retrieval in database in cloud environment,a low frequency word segmentation scheme based on public key algorithm is proposed.First,the low-frequency segmentation with the lowest weight of each segment is selected and processed by word segmentation,and the result is used as the index of ciphertext retrieval.Then,the matching algorithm is used to encrypt the whole plaintext.Finally,it is deployed in the database for efficiency test.The test results show that the scheme can effectively improve the retrieval efficiency of ciphertext in database.

关 键 词：Paillier公钥算法 低频分词 检索效率 数据库 HASH函数 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]