Arrangement for ciphering and deciphering of information

Details Arrangement for ciphering and deciphering of information Arrangement for ciphering and deciphering of information

1975-09-24

1977-11-15

Birmiel, Howard A.

Telegraphy

Systems

Printing

331 78, 364423, 364717, H04L 904

Patent

active

040586731

ABSTRACT:
An arrangement for ciphering and deciphering comprises a number of cycle length counters. Each of the counters has a different cycle length and generates a series of bits by scanning associated memory fields containing internal-key-information. The series of bits are combined in a logical unit in order to obtain a ciphered series. The arrangement includes a plurality of memories each comprising a number of memory fields corresponding to the number of counters. Switches are arranged to select internal-key-information by selecting memory fields from different memories depending on a control device, which is operated by certain character combinations in the transmitted text on the sender side and on the receiver side of the system.

REFERENCES:
patent: 3051783 (1962-08-01), Hell et al.
patent: 3506783 (1970-04-01), Mo et al.
patent: 3703727 (1971-06-01), Knowlton
patent: 3751648 (1973-08-01), Wu
patent: 3761696 (1973-09-01), Russell
patent: 3796830 (1974-03-01), Smith
patent: 3878331 (1975-04-01), Morgan et al.
patent: 3934078 (1976-01-01), Gannett

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