These accesses are protected by a password system or data encryption which keeps out unauthorized users by requiring users to enter a code before being able to access the computer.

• 电脑的密码系统或数据编码可以保护信息不被获取利用，因为这些密码系统或数据编码需要使用者输人密码才能进人电脑，这样就可使他人无法进人。