In practice, you should place the certifier under lock and key and may even put a guard (an actual person!) in charge of handing out the key via a very controlled mechanism.
实际上，您应该把证明锁起来再放上警卫(真正的人！)，通过严格控制的机制传递钥匙。
2
You can use Folder Guard to lock your personal files and folders with passwords, to stop other users from peeking into your records.
你可以使用文件夹卫队使用密码锁您的个人文件和文件夹，阻止往你的记录偷看其他用户。
3
One thief got to work on the guard while others broke the lock.