H - Electricity – 04 – L
Patent
H - Electricity
04
L
340/70
H04L 9/18 (2006.01) G06F 21/00 (2006.01) H04K 1/00 (2006.01) H04L 9/06 (2006.01)
Patent
CA 1336721
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.
585307
Bright Michael W.
Brown Daniel P.
Byrns John P.
Dabbish Ezzat A.
Mcclaughry Michael J.
Gowling Lafleur Henderson Llp
Motorola Inc.
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