SQLSERVER使用密码加密备份文件以防止未经授权还原数据库
SQLSERVER使用密码加密备份文件以防止未经授权还原数据库 在备份数据库的时候,用户可以为媒体集、备份集或两者指定密码 在backup语句中,定义备份集密码和媒体密码为可选功能。使用密码可防止利用SQLSERVER工具未经授权地执行还原操作和在媒体中添加备份集
SQLSERVER使用密码加密备份文件以防止未经授权还原数据库
在备份数据库的时候,用户可以为媒体集、备份集或两者指定密码
在backup语句中,定义备份集密码和媒体密码为可选功能。使用密码可防止利用SQLSERVER工具未经授权地执行还原操作和在媒体中添加备份集。
如果指定了密码则用户还必须提供媒体密码才能执行这些操作
关于媒体集和备份集大家可以参考MSDN:(v=SQL.90).aspx
尽管使用密码对防止利用SQLSERVER工具未经授权地访问媒体内容有帮助,但密码不能防止媒体内容被破坏。密码不能完全防止未经授权地访问媒体内容,香港服务器,
原因在于备份集中的数据没有加密,理论上可以被专为此目的创建的程序所查看备份文件里面的内容。
对于安全性至关重要的场合,服务器空间,防止未经授权的个人访问媒体非常重要
注意:从 SQL Server 2012 开始,PASSWORD 和 MEDIAPASSWORD 选项不可再用于创建备份; 但仍可以还原使用密码创建的备份!!!
以下是MSDN关于backup语句中的MEDIAPASSWORD选项和PASSWORD选项的解释
1 PASSWORD = { password | @password_variable } 2 为备份集设置密码。 PASSWORD 是一个字符串。 如果为备份集定义了密码,则必须提供此密码才能对该备份集执行任何的 SQL Server 还原操作。 3 但是,备份集密码不能防止覆盖备份文件。 若要防止覆盖备份文件,请改用媒体集密码 4 此密码提供的安全性较低。 它旨在防止授权用户或未授权用户使用 SQL Server 2005 工具进行不正确的还原,香港虚拟主机, 5 但是不能防止通过其他方式或通过替换密码来读取备份数据。 保护备份的最佳做法是将备份磁带存储在安全的位置, 6 或者备份到由适当的访问控制列表 (ACL) 保护的磁盘文件。 ACL 应设置在创建备份的根目录下。

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