Stream cipher system with feedback

Details Stream cipher system with feedback Stream cipher system with feedback

1987-09-14

1989-03-21

Cangialosi, Salvatore

Cryptography

Electric signal modification

Having production of printed copy

380 37, 380 42, 380 43, H04L 904

Patent

active

048151300

ABSTRACT:
A cipher system in which a key is initially inserted into a shift register and the serial output of the shift register is added to the plain text message and the sum is fed back into the serial input of the shift register. Parallel outputs of the shift register are led to a logic function which transforms the multiple inputs into a single output, the value of which is evenly distributed among the possible combinations on the input. The logic function output is then added to the message to produce the enciphered message. In the decipherer, the deciphered message is added to the serial output of the shift register to produce the serial input to the shift register. Otherwise, the decipherer closely resembles the encipherer.

REFERENCES:
patent: 3071649 (1963-01-01), Goodall
patent: 3654604 (1972-04-01), Crafton
patent: 3688193 (1972-09-01), McDonald
patent: 3925612 (1975-12-01), Guanella et al.
patent: 4152545 (1979-05-01), Gilbreath et al.
patent: 4157454 (1979-06-01), Becker
patent: 4255811 (1981-03-01), Adler
patent: 4304962 (1981-12-01), Fracassi et al.
patent: 4316055 (1982-02-01), Feistel
patent: 4434322 (1984-02-01), Ferrell
patent: 4447672 (1984-05-01), Nakamura
patent: 4663500 (1987-05-01), Okamoto et al.

Affiliated with

Also associated with

Rating

Stream cipher system with feedback does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Stream cipher system with feedback, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stream cipher system with feedback will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-484564