備份的資料庫首次還原後可能出現打不開的情況，需執行以下
--------------------忘記密碼了 刪除掉----------------
DROP SYMMETRIC KEY[SymmetricKeyCert]
DROP CERTIFICATE [CertRSA]
drop master key
-------------------- 重新建立 -------------------------
–建立Master KEY
CREATE MASTER KEY ENCRYPTION BY PASSWORD= N’NewPassword’;
–建立證書
CREATE CERTIFICATE [CertRSACertRSA]
AUTHORIZATION [dbo]
WITH SUBJECT = N’Certificate’, START_DATE = N’1/12/2015 00:00:00’, EXPIRY_DATE = N’12/31/2050 00:00:00’
ACTIVE FOR BEGIN_DIALOG = ON;
–建立祕鑰
CREATE SYMMETRIC KEY [ymmetricKeyCert]
AUTHORIZATION [dbo]
WITH ALGORITHM = AES_256
ENCRYPTION BY CERTIFICATE [CertRSACertRSA]
-------------備份的資料庫還原後可能出現打不開的情況，需執行以下-------------
–用密碼開啟Database master key
OPEN MASTER KEY DECRYPTION BY PASSWORD=N’NewPassword’
–向伺服器提供DMK （使用服務主祕鑰 （SMK）加密），以後就可以自動解密了
ALTER MASTER KEY REGENERATE WITH ENCRYPTION BY PASSWORD =N’NewPassword’