家贼难防 jiā zéi nán fáng
家贼难防的意思和解释：
隐藏在内部的坏人不容易防范。家贼难防的出处
宋·释普济《五灯会元》卷三十七：“问：‘家贼难防时如何？’师曰：‘识得不为冤。’”家贼难防的例子
家贼难防造句
俗话说“家贼难防”，市场上物业公司良莠不齐，万一聘请的保安人员素质“不达标”，就反而是引狼入室了。
As the saying goes "home-call it" black market property company, if the quality of security personnel employed by the "inadequacy", but move.
但“家贼难防”，内部网主机间直接相连，内部员工熟知资源的访问控制，在内部网络中传输的数据又缺少加密保护。
Because of the following reasons, internal security deserves adequate attention. Internal hosts are easy to connect directly. Employees are familiar with the access control to the internal resources.
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