| 摘要 |
<p>A system and method for authenticating a telephone to a telecommunications network prior to connecting a telephone call. The present invention programs a cellular telephone with a telephone identifier. When a caller uses the cellular telephone to make a call, the telecommunications network automatically routes the call to an authentication platform. There is one authentication platform in the telecommunications network for receiving all cellular calls. The cellular telephone sends a call origination (404) to the authentication platform including an electronic serial number (ESN) and a mobile identification number (MIN). The authentication generates a response by encrypting the random challenge with its ESN, MIN and a unique telephone identifier and sends the response to the authentication platform (408). The authentication platform compares (410) the response from the cellular telephone with its anticipated response to authenticate the call. If the response and the anticipated response match (412), the authentication platform allows the call to complete; otherwise, the authentication platform terminates the call (414).</p> |
