Detecting unauthorized modification of communication unit based on comparison between stored hardware identification code and hardware identification code generated from operational platform identification code

Patent 5388212 Issued on February 7, 1995. Estimated Expiration Date:

August 13, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Cordless telephone
Patent #: 4639549
Issued on: 01/27/1987
Inventor: Hirayama , et al.

Address encoding system for portable battery-operated devices
Patent #: 4731813
Issued on: 03/15/1988
Inventor: Schroeder

Public cordless telephone
Patent #: 4953198
Issued on: 08/28/1990
Inventor: Daly, et al.

Telephone call security system
Patent #: 5022067
Issued on: 06/04/1991
Inventor: Hughes

Telecommunication apparatus having an ID rechecking function
Patent #: 5109537
Issued on: 04/28/1992
Inventor: Toki

Method and apparatus for authenication and protection of subscribers in telecommunication systems
Patent #: 5239294
Issued on: 08/24/1993
Inventor: Flanders, et al.

Call processing using logical channel assignments
Patent #: 5249181
Issued on: 09/28/1993
Inventor: Wang, et al.

Telephone-based personnel tracking system Patent #: 5255183
Issued on: 10/19/1993
Inventor: Katz

Inventors

Application

No. 106018 filed on 08/13/1993

US Classes:

379/118, Identification of station379/145, Fraud or interference prevention455/410, Security or fraud prevention705/28, Inventory management714/819Comparison of data

Examiners

Primary: Bowler, Alyssa H.
Assistant: Shah, Alpesh M.

Attorney, Agent or Firm

Markinson; Timothy W., Moreno; Christopher P.

International Class

G06F 011/08

Abstract

A database unit monitors the communications occurring within at least one communication system for hardware identification codes of communication or broadcast units. Upon detecting the hardware identification code, the database unit compares the one received with a stored hardware identification code for the unit. When the stored hardware code does not match the one received, the database unit indicates that the unit has undergone an unauthorized modification.