​

xxxxxxxxxx

1

CREATE SYMMETRIC KEY key1 WITH ALGORITHM=DES

2

    ENCRYPTION BY PASSWORD='abc$123'

3

GO

4

​

5

OPEN SYMMETRIC KEY key1    

6

    DECRYPTION BY PASSWORD='abc$123'

7

​

8

DECLARE @str NVARCHAR(100),@Encrypted VARBINARY(MAX)

9

SET @str=N'要加密的字串'    

10

SELECT @Encrypted=ENCRYPTBYKEY(KEY_GUID('key1'),@str)

11

SELEcT '加密'=@Encrypted ,'解密'=CAST(DECRYPTBYKEY(@Encrypted) AS NVARCHAR(100))

12

CLOSE SYMMETRIC KEY key1

13

GO

14

DROP SYMMETRIC KEY key1

15

GO