Natural input encryption and method of use

Cryptography – Particular algorithmic function encoding – Nbs/des algorithm

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380 4, 380 49, H04K 100

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active

054992966

ABSTRACT:
Secure devices (e.g., a cryptophone, a cryptofax, a computer or other such electronic device) have an encryptor and a digitizer, the digitizer for receiving an input and generating an output supplied to the encryptor. According to the invention, the encryptor and the digitizer are coupled either physically, logically or through non-tamperable software to guarantee that a given ciphertext is the encryption, generated by the encryptor, of an output generated by the digitizer.

REFERENCES:
patent: 5222138 (1993-06-01), Balabon et al.
patent: 5239557 (1993-08-01), Dent
patent: 5276737 (1994-01-01), Micali
patent: 5293633 (1994-03-01), Robbins
patent: 5315638 (1994-05-01), Micali
"Escrowed Encryption Standard (EES)" FIPS Pub 185 Feb. 9, 1994.

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