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MSSQL数据加密解密代码

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OPEN SYMMETRIC KEY 命令关于 对称密钥加密使用证书解密  CREATE MASTER KEY ENCRYPTION BY PASSWORD = 'password'  go  CREATE CERTIFICATE CertTest  with SUBJECT = 'Test Certificate'  GO  --创建非对称密钥  CREATE ASYMMETRIC KEY TestAsymmetric  WITH ALGORITHM = RSA_2048  ENCRYPTION BY PASSWORD = 'password1' ;  GO  ALTER ASYMMETRIC KEY TestAsymmetric WITH PRIVATE KEY (DECRYPTION BY PASSWORD = 'password1')  --DROP ASYMMETRIC KEY TestAsymmetric  --创建对称密钥  CREATE SYMMETRIC KEY TestSymmetric  WITH ALGORITHM = AES_256  ENCRYPTION BY PASSWORD = 'password' ;  GO  OPEN SYMMETRIC KEY TestSymmetric  DECRYPTION BY PASSWORD = 'password' ;  go  SELECT  ENCRYPTBYASYMKEY(ASYMKEY_ID ('TestAsymmetric'), name) ,  CAST(deCRYPTBYASYMKEY (ASYMKEY_ID( 'TestAsymmetric'),ENCRYPTBYASYMKEY (ASYMKEY_ID( 'TestAsymmetric'),name ) )  as nvarchar(200 )),  ENCRYPTBYCERT ( Cert_ID('CertTest' ),name),  CAST(deCRYPTBYCERT (Cert_ID ('CertTest'), ENCRYPTBYCERT (Cert_ID( 'CertTest'),name ))  as nvarchar (200)),  EncryptByKey ( KEY_GUID('TestSymmetric' ),name),  CAST(decryptByKey (EncryptByKey (KEY_GUID ('TestSymmetric'), name))  as nvarchar (200))  FROM sys .objects  。

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