| 摘要 |
This invention relates to using consumer devices, such as mobile telephones, to identify, authenticate, locate and contact users of security and asset management systems. Such consumer devices can be used not only with the security systems but als o for other uses. A device is initially registered with the security system. As needed, the device is presented to the system for authentication, enabling a person access to a secure area. In addition, the system can determine the person's location in the secure area and can send information messages to the person as well as notifying the person in case o f emergency.
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