Method for setting code text generators in ciphering devices

Details Method for setting code text generators in ciphering devices Method for setting code text generators in ciphering devices

1978-02-16

1980-07-08

Birmiel, Howard A.

Pulse or digital communications

Repeaters

Testing

375106, H04L 904

Patent

active

042118913

ABSTRACT:
In a procedure in which data is ciphered at a transmitter by being linked with key data generated by a code text generator and is deciphered at a receiver by appropriate linkage of the ciphered data with the same key data generated by an identical code text generator, the code text generator in the transmitter produces a pseudorandom sequence which determines the starting state of the generator and a formation rule, and the code text generator of the receiver is set to produce the same pseudorandom sequence by transmission from the transmitter to the receiver of an enciphered signal sequence defining the starting state and formation rule which determines the sequence to be produced by the transmitter code text generator.

REFERENCES:
patent: 3876832 (1975-04-01), Morgan et al.
patent: 4058673 (1977-11-01), Johansson
patent: 4095046 (1978-06-01), Frutiger
patent: 4133973 (1979-01-01), Branscome et al.
patent: 4133974 (1979-01-01), Morgan

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