云存储中基于对称谓语加密的可控隐私保护搜索方案  

Research of controllable privacy preserving searching scheme based on SPE in cloud storage

作　　者：崔春英[1] 胡海芝[1] 李雪梅[2] 

机构地区：[1]周口师范学院计算机科学与技术学院,河南周口466001 [2]山西大学计算机工程系,太原030013

出　　处：《计算机应用研究》2015年第12期3723-3728,共6页Application Research of Computers

基　　金：河南省科技厅软科学项目(142400411237);河南省高等学校重点科研项目(15B520045)

摘　　要：针对传统加密方法在搜索云服务器数据时存在的效率不高和密钥泄露问题,提出了一种具有可控隐私保护搜索函数的对称谓语加密算法。首先,密钥所有者公布一些公共参数,并生成主密钥;然后,服务器端检查密文的属性是否满足令牌的谓语,并利用谓语令牌搜索匹配的密文;最后,密钥所有者或受委托人利用解密程序获取相应的明文。安全性分析表明,该方案在语义安全、属性隐藏和密钥保密方面都具有较好的安全性;性能比较表明,相比其他几种较为先进的谓语加密方案,该方案在效率方面得到了明显提升。To solve the problem of inefficient and disclose key in traditional encryption algorithm while searching data on cloud servers, this paper proposed a variant algorithm of symmetric predicate eneryption with controllable privacy preserving search functionalities. Firstly, the key owner released some public parameters to generate master key. Then, the server checked whether cryptograph properties satisfied the token predicate, and used predicate token to search matching cipher text. Finally, the secret key owner or client used a procedure to obtain the corresponding plaintext. Security analysis shows that proposed scheme has perfect security on semantic security, attribute hiding and key confidentiality. Performance comparison shows that proposed schema has improved the efficiency compared with several advanced predicate encryption schemes.

关 键 词：云存储 对称谓语加密 可控隐私保护 授权搜索 语义安全 属性隐藏 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]