sqlserver对数据进行加密、解密

– 创建测试表

CREATE TABLE TBLUser 
(    
    Name             nvarchar(30),     
    Password         varbinary(1000)
)

– 创建数据库主密钥

CREATE master key  ENCRYPTION BY PASSWORD ='passW@ord'

– 创建证书

CREATE CERTIFICATE TestCert with SUBJECT = 'Test Certificate'

– 创建对称密钥

CREATE SYMMETRIC KEY TestSymmetric WITH ALGORITHM = AES_256
    ENCRYPTION BY CERTIFICATE TestCert 

– 使用对称秘钥加密数据

OPEN SYMMETRIC KEY TestSymmetric DECRYPTION BY CERTIFICATE TestCert;
INSERT INTO TBLUser values('张三', ENCRYPTBYKEY(Key_Guid(N'TestSymmetric'), '123456'));
CLOSE SYMMETRIC KEY TestSymmetric;

– 查看加密后的数据

SELECT * FROM TBLUser

– 解密数据

OPEN SYMMETRIC KEY TestSymmetric DECRYPTION BY CERTIFICATE TestCert;
SELECT Name, CAST(DecryptByKey(password) as varchar(100)) Password FROM TBLUser;
CLOSE SYMMETRIC KEY TestSymmetric;

注：转载于https://jingyan.baidu.com/article/4dc4084852fceec8d946f1ee.html
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