摘要：

针对基于单断言的密文区间检索方案SRQSAE不能抵御唯密文统计分析攻击的不足,提示一种基于云存储技术的安全密文区间检索方案。通过对密钥矩阵的结构进行改进并引入随机数,使方案能够隐藏关键字的大小排列关系,并且保证关键字索引和区间陷门的机密性,达到排列安全和归并特征安全的要求。与SRQSAE方案的对比结果表明,该方案在保证安全性的同时,能够提升复杂度、存储空间、运算时间和数据传输量等方面的性能。

关键词: 云存储, 密文检索, 区间检索, 关键字索引, 检索陷门

Abstract:

To solve the problem that the ciphertext interval search scheme based on single assertion named SRQSAE cannot resist statistical analysis attack of only-ciphertext,a new secure ciphertext interval retrieval scheme based on cloud storage technology is proposed.Through improving the structure of the key matrix and introducing random numbers,the proposed scheme can hide the size of keyword and ensure the confidentiality of keyword index and interval trapdoor,which can meet the requirements for the security of arrange and merge features.The comparative results of the complexity,storage space,operation time and data transmission show that,compared with SRQSAE scheme,the proposed scheme can get great improvement on above performance while ensuring the security.

Key words: cloud storage, ciphertext retrieval, interval retrieval, keyword index, retrieval trapdoor

中图分类号: 

• TP309