In access control apopular form of knowledge test for access control.A password is a string of alphanumeric data or a phrase that must be entered int o a system to gain access to a physical area or a resource.

• 存取控制中一种测试访问控制权的常见方式，口令是由字母和数字组成的字符串或短语，它们必须输入系统以获得某一实际区域或资源的使用权限。