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发明授权
CN105024802B 云存储中基于双线性对的多用户多关键词可搜索加密方法 有权 转让

云存储中基于双线性对的多用户多关键词可搜索加密方法
摘要：
本发明公开了一种云存储中基于双线性对的多用户多关键词可搜索加密方法，具体步骤为：步骤1、系统参数初始化；步骤2、添加用户；步骤3、文件拥有者对文件加密和安全索引生成；步骤4、服务器对索引重加密；步骤5、用户关于关键词搜索令牌的生成；步骤6、云存储服务器关于密文关键词的搜索；步骤7、用户关于密文的解密；步骤8、撤销用户，本发明解决了现有技术中存在的云存储数据加密后不能实现关键词检索的问题。
摘要（英）：

The invention discloses a bilinear pairing-based multi-user multi-keyword searchable encryption method in cloud storage. The specific steps include: 1. initialization of system parameters; 2. addition of users; 3. file encryption by a file owner and generation of a safe index; 4. index re-encryption by a server; 5. generation of a keyword search token by the users; 6. search of ciphertext keywords by a cloud storage server; 7. decryption of ciphertext by the users; and 8. cancellation of the users. The bilinear pairing-based multi-user multi-keyword searchable encryption method provided by the invention solves the problem existing in the prior art that keyword search cannot be realized after cloud storage data are encrypted.

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