Cryptographs

Details Cryptographs Cryptographs

1936-10-23

2000-10-10

Gregory, Bernarr Earl

Cryptography

Electric signal modification

Having mechanical control of signal encryption

380287, 380 52, 380 56, 380 57, 380 59, 341 50, 341 90, 341 91, H04L 938, H04L 910, H04L 1702, H04L 1716

Patent

active

06130946&

ABSTRACT:
The cryptographic system automatically and continuously changes the cipher equivalents representing plaintext characters so as to prevent any periodicity in the relationship. The system has a series of juxtaposed, rotatable, connection changing mechanisms to provide a large number of alternative paths for the passage of an electric current corresponding to a message character. Further, the system has parts for the irregular and permutative displacements of the members of a set of circuit changing mechanisms to thwart cryptanalysis. The juxtaposed cipher commutators are controlled by cam wheels of different diameters.

REFERENCES:
patent: 1540107 (1925-06-01), Damm
patent: 1644239 (1927-10-01), Damm
patent: 1683072 (1928-09-01), Hebern
patent: 2028772 (1936-01-01), Friedman

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