Apparatus and method for secure communication based on channel c

Details Apparatus and method for secure communication based on channel c Apparatus and method for secure communication based on channel c

1996-06-17

1998-04-28

Tarcza, Thomas H.

Cryptography

Key management

Having particular key generator

380 21, 455 385, 455 674, H04L 900, H04B 700, H04B 1700, H04Q 302

Patent

active

057455783

ABSTRACT:
A method and an apparatus for establishing a key sequence for secure communication through a communication channel between a first transceiver and a second transceiver. Each transceiver transmits to the other transceiver a plurality of tones having predetermined phases and frequencies. Each transceiver transmits back to the other transceiver, without substantial change, the plurality of tones transmitted by the other transceiver. The transceivers determine a key based on the differences in the phases of transmitted and received plurality of tones.

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