Variant key matrix cipher system

Details Variant key matrix cipher system Variant key matrix cipher system

1973-10-15

1980-03-25

Birmiel, Howard A.

Telegraphy

Systems

Printing

H04L 900

Patent

active

041951964

ABSTRACT:
This is a cipher system for enciphering a stream of binary data by means of a product cipher. A clear message represented in a binary data format is transformed into a cipher message by operating on each bit of clear information with a complex modulo-two addition function. This function is dependent on previous internal cipher digits transmitted and varies for each message bit processed. The function is developed by continually shifting a key matrix under the control of a varying control matrix. The control matrix is formed from the sub-product of the complex function developed in generating each cipher bit.

REFERENCES:
patent: 3557307 (1971-01-01), Florin et al.
patent: 3624610 (1971-11-01), Warring
patent: 3657699 (1972-04-01), Rocher
patent: 3681708 (1972-08-01), Olmstead
patent: 3798359 (1974-03-01), Feistel

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