Research/Patents/US 5448643
US 5448643

AUTHENTICATION SYSTEM

Assignee

Filed

Jan 15, 1982

Granted

Sep 5, 1995

Location

Abstract

A system for secure communications between first and second locations wherehe first location measures the location of the second location. The first location then codes that measured location along with a random reply channel code for communications from the second location to the first location. The first location then transmits the two codes to the second location which decodes the two signals. The second location then measures it's own location and compares it with the received location. The newly measured location is coded and transmitted to the first station on the randomly selected reply channel.

Source: Google Patents

35 USC §181 Secrecy Order

Imposed

Jan 15, 1982

Rescinded

Feb 17, 1995

Duration

13 years, 1 month

Inventor

  • 1Unknown Unknown
Back to patent indexSource: USPTO 35 USC §181 secrecy order records