Cryptographic method and apparatus with electronically redefinab

Details Cryptographic method and apparatus with electronically redefinab Cryptographic method and apparatus with electronically redefinab

1988-02-01

1990-04-03

Cangialosi, Salvatore

Cryptography

Particular algorithmic function encoding

380 29, 380 49, 380 50, H04L 904

Patent

active

049146971

ABSTRACT:
A cryptographic apparatus for encrypting and decrypting digital words includes a mechanism that permits a cipher algorithm to be electronically stored after the manufacture of the apparatus. The storing mechanism includes at least one electrically erasable, programmable gate array containing a portion of the cipher algorithm and at least one random access memory device coupled to the array for storing digital data generated by the algorithm. A mechanism which is coupled to the gate array and memory device controls the execution of the algorithm for each digital word thereby decrypting encrypted digital words and encrypting non-encrypted digital words.

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