示例一、啟用透明加密(TDE)

WHEN 2 THEN 'Encryption in progress'
WHEN 3 THEN 'Encrypted'
WHEN 4 THEN 'Key change in progress'
WHEN 5 THEN 'Decryption in progress'
END encryption_state,
key_algorithm,
key_length
FROM sys.dm_database_encryption_keys

/*
對所有用戶數據庫的加密處理也包含對tempdb的處理
databasenm encryption_state key_algorithm key_length
tempdb Encrypted AES 256
DB_Encrypt_Demo Encrypted AES 128
*/

注意：對所有用戶數據庫的加密處理也包含對tempdb的處理

GO
USE DB_Encrypt_Demo
GO
ALTER DATABASE ENCRYPTION KEY
ENCRYPTION BY SERVER CERTIFICATE TDE_Server_Certificate_V2--用新證書修改DEK

--移除數據庫透明加密
ALTER DATABASE DB_Encrypt_Demo
SET ENCRYPTION OFF
GO

--移除TDE后，可以刪除DEK
USE DB_Encrypt_Demo
GO
Drop DATABASE ENCRYPTION KEY
Go