胁迫码duress/panic code
一种用户受到入侵者胁迫时使用的可解除防盗报警控制器警戒状态的专用密码。使用此密码，可以正常解除警戒，但与此同时向远程监控站传送胁迫报警信息。
http://www.jifang360.com/news/2009527/n6433305.html


A duress code is a covert signal used by an individual that is under duress to indicate their state. The term duress code typically refers to a signal embedded in normal communication, such as a word or phrase used during conversation to alert other personnel of the duress. Alternatively, the signal may be incorporated into the authentication process itself, typically in the form of a panic password, distress password, or duress PIN that is distinct from the user's normal password or PIN. These concepts are related to a panic alarm and often achieve the same outcome.
http://en.wikipedia.org/wiki/Duress_code