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  • MSSQL加密数据表(sql2005)

    --创建数据库主秘钥
    USE adb
    GO
    CREATE MASTER KEY
    ENCRYPTION BY PASSWORD = 'P8ssw0rd'
    GO

    --创建存放加密数据的表
    CREATE TABLE dbo.SecTable
    (ID INT IDENTITY PRIMARY KEY,
    DATA NVARCHAR(100))
    GO

    --创建数字证书,数字证书的私钥被数据库主秘钥加密
    CREATE CERTIFICATE TomCert
    WITH
        SUBJECT = 'TOM CERTIFICATE',
        EXPIRY_DATE= '01/01/2009'

    --创建堆成秘钥,被用证书对其进行加密
    CREATE SYMMETRIC KEY Sym_Tom
    WITH ALGORITHM = DESX ENCRYPTION BY CERTIFICATE TomCert

    --使用证书解开对称秘钥,将数据使用对称秘钥加密后存储与表中,完成后关闭对称秘钥
    OPEN SYMMETRIC KEY Sym_Tom DECRYPTION BY CERTIFICATE TomCert

    INSERT INTO SecTable (DATA) VALUES(EncryptByKey(Key_GUID('Sym_Tom'), N'TOM1'))
    CLOSE SYMMETRIC KEY Sym_Tom

    --察看被加密的数据内容
    SELECT * FROM dbo.SecTable
    显示乱码

    --使用证书解开堆成秘钥,解密数据表中的数据,完成后关闭对称秘钥
    OPEN SYMMETRIC KEY Sym_Tom DECRYPTION BY CERTIFICATE TomCert
    SELECT ID, CAST(DecryptByKey(Data) AS NVARCHAR) FROM dbo.SecTable
    CLOSE SYMMETRIC KEY Sym_Tom

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  • 原文地址:https://www.cnblogs.com/bennylam/p/1652422.html
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