Telecommunications – Radiotelephone system – Security or fraud prevention
Patent
1996-08-27
2000-12-26
Hunter, Daniel S.
Telecommunications
Radiotelephone system
Security or fraud prevention
455411, 455550, 455 95, 380 23, H04M 1100
Patent
active
061672521
ABSTRACT:
A device that broadcasts an electronic serial number, or ESN, is made secure from cloning using one or more of a plurality of measures, including coupling the memory used for storing the ESN more closely to the ESN processor, fabricating the ESN memory as part of the ESN processor, including the ESN memory in another processor and encrypting communications between the other processor and the ESN processor, and comparing multiple copies of the ESN stored in different memories. The later technique is also effective in securing the JTAG port of an ESN processor.
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NEC Electronics, Inc., IS-54 Dual Mode Cellular Telephone Baseband Processing Chipset, Feb. 1995, pp. 1-4, Product brief.
Hunter Daniel S.
NEC Electronics Inc.
Terrile Stephen A.
Tran Pablo
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