Method and apparatus for altering the synchronous compare charac

Details Method and apparatus for altering the synchronous compare charac Method and apparatus for altering the synchronous compare charac

1974-05-28

1976-02-03

Wilbur, Maynard R.

Telegraphy

Systems

Printing

178 695R, 179 15R, H04K 100, H04L 704

Patent

active

039366014

ABSTRACT:
In order to provide for a digital data transmitting system of increased security, means are provided to dynamically alter the synchronous compare character between message transmissions. Included in the data communication system are: a character general for programmatically generating a synchronous compare character; a character storage register for storing the character so generated; and circuitry for moving the synchronous character from the storage register to the data transmission circuitry. By dynamically altering the synchronous character between message transmissions, it is possible to substantially enhance the security of the data transmission system.

REFERENCES:
patent: 3472956 (1969-10-01), Glasson
patent: 3532985 (1970-10-01), Glomb et al.
patent: 3546384 (1968-09-01), Brigham
patent: 3598914 (1971-08-01), Synnott
patent: 3649758 (1972-03-01), Clark
patent: 3798378 (1974-03-01), Epstein

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