子密码锁，是需要主人记住自己的开锁密码，开门时只需要将密码输入，就可以开门，所以密码锁的核心问题就是密码的比对问题。-Child lock, is the need to remember your master password unlock, open the door just to the password input, you can open the door, so lock the core issue is the password of the alignment.