TDE--相关Demo

SQL Server 2008引入透明数据加密(Transparent Data Encryption),
它允许你完全无需修改应用程序代码而对整个数据库加密。当一个用户数据库可
用且已启用TDE时,在写入到磁盘时在页级实现加密。在数据页读入内存时解密
。如果数据库文件或数据库备份被盗,没有用来加密的原始证书将无法访问。

TDE Demo:

TDE--相关Demo
--在还原数据库之前必须还原证书,否则数据无法被还原

--错误提示:找不到指纹为'XXX' 的服务器证书。

use master;

GO

--还原证书DB_TDE_cert

CREATE CERTIFICATE DB_TDE_cert

FROM FILE = 'E:\DB_TDE_cert.cer'

WITH PRIVATE KEY (FILE = 'E:\DB_TDE_cert.pvk',

DECRYPTION BY PASSWORD = 'Tde@sql123')

GO

--还原数据库

RESTORE DATABASE [TestDB] FILE = N'TestDB'

FROM  DISK = N'E:\TestDB.BAK' WITH  FILE = 1, 

MOVE N'TestDB' TO N'E:\DB\\TestDB.mdf', 

MOVE N'TestDB_log' TO N'E:\DB\\TestDB_0.LDF',

NOUNLOAD,  STATS = 10

GO
View Code

还原被TDE加密的数据库备份

TDE--相关Demo
use master

GO

SELECT name,is_master_key_encrypted_by_server FROM sys.databases;

 

--查看master数据库下的密钥信息

SELECT * FROM sys.symmetric_keys;

 

--创建证书用来保护数据库加密密钥(DEK)

CREATE CERTIFICATE DB_TDE_cert

WITH SUBJECT = N'DB_TDE_cert';

 

--备份证书

BACKUP CERTIFICATE DB_TDE_cert

TO FILE = 'D:\DB_TDE_cert.cer'

WITH PRIVATE KEY (

FILE = 'D:\DB_TDE_cert.pvk' ,

ENCRYPTION BY PASSWORD = 'Tde@sql123' );

 

---创建测试DB

IF(DB_ID('TestDB') IS NOT NULL)

BEGIN

   DROP DATABASE TestDB

END

GO

CREATE DATABASE TestDB

GO

 

USE TestDB;

GO

--创建由master_server_cert保护的DEK 数据库加密密钥(对称密钥)

CREATE DATABASE ENCRYPTION KEY

WITH ALGORITHM = AES_128

ENCRYPTION BY SERVER CERTIFICATE DB_TDE_cert;

GO

--将数据库改成单用户模式

use master

GO

ALTER DATABASE TestDB SET SINGLE_USER WITH ROLLBACK IMMEDIATE;

GO

--开始数据加密

ALTER DATABASE TestDB SET ENCRYPTION ON;

GO

--将数据库设置为多用户模式

ALTER DATABASE TestDB SET MULTI_USER WITH ROLLBACK IMMEDIATE;

GO

 

--查看数据库加密模式

SELECT DB_NAME(database_id),encryption_state

FROM sys.dm_database_encryption_keys;

 

 
View Code

管理删除TDE

TDE--相关Demo
USE TestDB 

GO 

--修改加密算法

ALTER DATABASE ENCRYPTION KEY REGENERATE WITH ALGORITHM = AES_128 

Go 

USE master 

GO

--创建新的证书

CREATE CERTIFICATE TDE_Server_Certificate_V2 

WITH SUBJECT = 'Server-level cert for TDE V2'

GO 

USE TestDB 

GO 

--用新证书修改DEK  

ALTER DATABASE ENCRYPTION KEY

ENCRYPTION BY SERVER CERTIFICATE TDE_Server_Certificate_V2

 

 

--移除数据库透明加密

ALTER DATABASE DB_Encrypt_Demo  SET ENCRYPTION OFF

GO  

--移除TDE后,可以删除DEK 

USE TestDB 

GO 

Drop DATABASE ENCRYPTION KEY

GO 

 
View Code

 

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