You can use IBM Database Encryption Expert to encrypt the underlying operating system data and backup files.

可以使用 IBM Database Encryption Expert 加密底层操作系统数据和备份文件。

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Moreover, the encryption method is based on the extended index mechanism of database system, and can not be implemented on all databases.

而且这种加密方式依赖于数据库系统的扩展索引机制，并不能在所有数据库上实现。

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This approach is transparent to the database itself, the database management system can not feel the existence of encryption and decryption process.

这种方式对于数据库自身来说也是透明的，数据库管理系统也感觉不到加密解密过程的存在。

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