System and method for preventing cellular fraud

WIPO Patent Application WO1998000956

A3

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 to the authentication platform including an electronic serial number (ESN) and a mobile identification number (MIN). The authentication platform returns a random challenge to the cellular telephone. The cellular telephone 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. The authentication platform generates an anticipated response by encrypting the random challenge with the ESN and MIN provided in the originating call and with a telephone identifier retrieved from a local database. The authentication platform compares the response from the cellular telephone with its anticipated response to authenticate the call. If the response and the anticipated response match, the authentication platform allows the call to complete; otherwise, the authentication platform terminates the call.

JORDAN DAVID P (US)
REED ELAINE (US)
MCMAHON KEVIN (US)

PCT/US1997/011316

February 12, 1998

June 30, 1997

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MCI COMMUNICATIONS CORP (US)

H04M3/38; H04W12/06; (IPC1-7): H04L9/32; H04B7/26

US5311596A	1994-05-10
US5420908A	1995-05-30
US5351296A	1994-09-27
US5150412A	1992-09-22
US5455863A	1995-10-03

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