Communication method and device

Details Communication method and device Communication method and device

1995-12-13

1998-08-11

Canqialosi, Salvatore

Cryptography

Equipment test or malfunction indication

380 21, 380 30, H04L 900

Patent

active

057938660

ABSTRACT:
A system (100) and method of improving activation security allows a remote device (104) to identify that there is a difference between a first signal transmitted by a central site (102) and a first signal received by the remote device. A derived number is used. The derived number can be displayed to the user for verbal verification by the user, or the derived number can be used internally of the remote device, or the central site, for verification that is transparent to the user. A significant amount of security is added without substantially altering the communication protocol.

REFERENCES:
patent: 4590470 (1986-05-01), Koenig
patent: 5222140 (1993-06-01), Beller et al.
patent: 5249230 (1993-09-01), Mihm, Jr.
patent: 5335278 (1994-08-01), Matchett et al.
patent: 5371794 (1994-12-01), Diffie et al.
patent: 5402490 (1995-03-01), Mihm, Jr.
Bruce Schneier, "Applied Cryptography-Protocols, Algorithms and Source Code in C", 1994, pp. 22, 42-65.
Ed Tiedemann and Irfan Khan, Qualcomm, Inc., Over-the-Air Service Provisioning (OTASP-Stage 2 (Version 0.1), TIA Subcommitte TR45.2 Intersystem Operations, Telecommunications Industry Association, Dec. 1995 .

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