Ciphertext to plaintext communications system and method

Details Ciphertext to plaintext communications system and method Ciphertext to plaintext communications system and method

1989-11-16

1991-02-12

Buczinski, Stephen C.

Cryptography

Key management

Having particular key generator

380 49, H04L 902

Patent

active

049930702

ABSTRACT:
A ciphertext to plaintext communications system including a communications channel, a generator, a data device, an encryptor, a black to red communicator (BRC) device, a decryptor, and a comparator. The generator generates a first data-bit sequence which has a predetermined bit pattern. The encryptor encrypts the first data-bit sequence as an encrypted-bit sequence. The encrypted-bit sequence is transmitted over the communications channel and received by the BRC device. The data device generates the second data-bit sequence, which may include data from diagnostic equipment or any other source of information originating in the channel carrying the encrypted-bit sequence. The BRC device modifies the encrypted-bit sequence using the second data-bit sequence. The decryptor decrypts the modified-encrypted-bit sequence as a third data-bit sequence. The third data-bit sequence is compared with the predetermined bit pattern with the comparator, which thereby generates the second data-bit sequence.

REFERENCES:
patent: 3868631 (1975-02-01), Morgan et al.

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