In access control, a unique alphanumeric code used to identify a individual, usually in combination with a physical token,such as a magnetic stripe card. The token is entered into an appropriate computer/com munication terminal to effect a transaction.

• 在存取控制中,一种用以确定某个人的具有唯一的字母数字码。通常与某种物理标志(如磁卡)联合使用。将该物理标志输入适当的计算机通信终端以产生某种作用。