SQLServer 数据库的加密与解密

SqlServer加密层次。SqlServer加密是基于密钥层次结构的。在层次结构的最顶端是服务主密钥。它是由SqlServer首次需求加密时生成的。在实践加密数据时，SQLServer提供了4种方法：?通行短语。?对称密钥。?非对称密钥。?证书。

(SqlServer encryption level. SqlServer encryption is based on a key hierarchy. At the very top of the hierarchy is the service master key. It was generated by SqlServer when encryption was first required. In practice encrypting data, SQLServer provides 4 methods: ? Passphrase. ? Symmetric keys. ? Asymmetric keys. ?Certificate.)

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