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。

youdao

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。

youdao

One thief got to work on the guard while others broke the lock.

一个窃贼去袭击门卫，其他人则去砸锁。

youdao