建立密文数据库是实现数据安全的有效方法。
An effective method to realize database security is to establish encrypted database.
密文数据库是增强数据库系统安全性的有效技术途径。
Encrypted database is an effective technique to strengthen the security of database Management System.
由于敏感数据被加密，任何直接对数据库文件进行分析的攻击方式，都只能看到密文。
Because the sensitive data is encrypted, any direct attack on the database file analysis, can only see the ciphertext.
根据加密数据库的特点，分析了建立密文索引需要考虑的主要因素。
According to the characters of the ciphertext database, the major factors to create a ciphertext index are analyzed.
针对数据库中数据的保密性问题，分析了目前已有的一些加密机制，提出了一种基于密文索引的新的查询方法。
Aiming at the data secrecy problem in database, we have analyzed some present encryption mechanism and put forward a new query method based on ciphertext index.
提出了把秘密同态理论应用于加密数据库中重要或敏感的信息，从而可以实现直接对数据库密文进行操作的方法。
It is proposed to apply the theory of private homomorphism to encrypt the database important or sensitive information, thus realizing direct operation of encrypted message.
提出了把秘密同态理论应用于加密数据库中重要或敏感的信息，从而可以实现直接对数据库密文进行操作的方法。
It is proposed to apply the theory of private homomorphism to encrypt the database important or sensitive information, thus realizing direct operation of encrypted message.
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