數據庫數據加密與解密

MVC的練習之旅，將要進入另外一個階段了，將增長會員功能。在進入以前，一些準備工做須要作的。一步一個腳印吧。設計會員功能，其中密碼字段，Insus.NET想對它進行加密。就因這個加密，還得花上一些時間來整理。
Insus.NET參考MSDN網站，列出數據庫加密解密例子(如下是在SQL Server 2012進行)：

--建立數據庫主密鑰
CREATE MASTER KEY ENCRYPTION BY PASSWORD ='Pass#Tutorial#word'
GO

 

--建立證書
CREATE CERTIFICATE PasswordCert 
with SUBJECT = 'Member Password Certificate'
GO

 

--建立非對稱密鑰
CREATE ASYMMETRIC KEY PasswordAsymmetric
    WITH ALGORITHM = RSA_2048 --{ RSA_512 | RSA_1024 | RSA_2048 } 
    ENCRYPTION BY PASSWORD = 'Pass#Tutorial#word'; 
GO

 

--建立對稱密鑰
CREATE SYMMETRIC KEY PasswordSymmetric
    WITH ALGORITHM = AES_256 --{ AES_128 | AES_192 | AES_256 | TRIPLE_DES_3KEY }
    ENCRYPTION BY PASSWORD = 'Pass#Tutorial#word';
GO

 

--由證書加密對稱密鑰
CREATE SYMMETRIC KEY SymmetricByCert
    WITH ALGORITHM = AES_256
    ENCRYPTION BY CERTIFICATE PasswordCert;
GO

 

--由對稱密鑰加密對稱密鑰
OPEN SYMMETRIC KEY PasswordSymmetric
    DECRYPTION BY PASSWORD='Pass#Tutorial#word'

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

 

--由非對稱密鑰加密對稱密鑰
CREATE SYMMETRIC KEY SymmetricByAsy
    WITH ALGORITHM = AES_256
    ENCRYPTION BY ASYMMETRIC KEY PasswordAsymmetric;
GO

 

建立以後，會要相應的數據庫之下，顯示以下：