数据库数据加密与解密

MVC的练习之旅，将要进入另一个阶段了，将增加会员功能。在进入之前，一些准备工作需要做的。一步一个脚印吧。设计会员功能，其中密码字段，Insus.NET想对它进行加密。就因这个加密，还得花上一些时间来整理。
Insus.NET参考MSDN网站，列出数据库加密解密例子(以下是在SQL Server 2012进行)：

--创建数据库主密钥
CREATE MASTER KEY ENCRYPTION BY PASSWORD =‘Pass#Tutorial#word‘
GO

--创建证书
CREATE CERTIFICATE PasswordCert
with SUBJECT = ‘Member Password Certificate‘
GO

--创建非对称密钥
CREATE ASYMMETRIC KEY PasswordAsymmetric
    WITH ALGORITHM = RSA_2048 --{ RSA_512 | RSA_1024 | RSA_2048 }
    ENCRYPTION BY PASSWORD = ‘Pass#Tutorial#word‘;
GO

--创建对称密钥
CREATE SYMMETRIC KEY PasswordSymmetric
    WITH ALGORITHM = AES_256 --{ AES_128 | AES_192 | AES_256 | TRIPLE_DES_3KEY }
    ENCRYPTION BY PASSWORD = ‘Pass#Tutorial#word‘;
GO

--由证书加密对称密钥
CREATE SYMMETRIC KEY SymmetricByCert
    WITH ALGORITHM = AES_256
    ENCRYPTION BY CERTIFICATE PasswordCert;
GO

--由对称密钥加密对称密钥
OPEN SYMMETRIC KEY PasswordSymmetric
    DECRYPTION BY PASSWORD=‘Pass#Tutorial#word‘

CREATE SYMMETRIC KEY SymmetricBySy
    WITH ALGORITHM = AES_256
    ENCRYPTION BY SYMMETRIC KEY PasswordSymmetric;
GO

--由非对称密钥加密对称密钥
CREATE SYMMETRIC KEY SymmetricByAsy
    WITH ALGORITHM = AES_256
    ENCRYPTION BY ASYMMETRIC KEY PasswordAsymmetric;
GO

创建之后，会要相应的数据库之下，显示如下：

数据库数据加密与解密