Patent
Cellular telephone anti-fraud system
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TLDR
In this paper, a transmitter identification system was proposed to determine if cellular phones in a cellular phone system are authorized as distinguished from cloned phones, operated by fraudulent users, that are unauthorized.Abstract:
A transmitter identification system to determine if cellular phones in a cellular phone system are authorized as distinguished from cloned phones, operated by fraudulent users, that are unauthorized. Components used in the manufacture of cellular phones vary slightly from one phone to anther so that, when the phones are used, the transmitter signals from each phone have different external signal traits. For each cellular phone call, the transmitter signal is received and characterized using a received set of features resulting from the external signal traits. The received set of features is compared with previously stored sets of Features in a database to determine if the call is authorized or unauthorized and, if unauthorized, the call is stopped and access to the fraudulent user is denied.read more
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References
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Patent
Broadcast information classification system and method
TL;DR: In this article, a plurality of second stage reference patterns, which correspond to the first stage reference spectragrams, are correlated with one of the analyzed waveforms in the queueing order established previously.
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TL;DR: In this paper, a method is disclosed for processing call data among telephone switching offices and a remotely situated data base system for deriving call service information needed to complete special service calls, such as INward WATS (Wide Area Telephone Service) calls to a destination specified by the derived information.
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Apparatus and method for detecting fraudulent telecommunication activity
TL;DR: In this article, an apparatus for detecting potentially fraudulent telecommunication activity, comprising a digital computer; interface, operatively connected to the digital computer, for receiving a call information record for each call involving a particular subscriber; comparator operating within the digital computers, for comparing a parameter of the particular user's current usage with a subscriber-specific pattern of the user's historical usage; and an output for outputting an indication of a potentially fraudulent call based upon a result of the comparison performed by the comparator.
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