Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent
1994-06-21
1997-07-29
Gregory, Bernarr E.
Cryptography
Particular algorithmic function encoding
Nbs/des algorithm
380 37, 380 43, 380 49, 380 50, H04L 906, H04L 900
Patent
active
056527969
ABSTRACT:
The data encryption system includes a first stage and a second stage data encryption engine in combination with a micro control system. The data encryption system is responsive to control signals from the micro control system. The first stage is comprised of an 8-bit bus input and output from the first stage to the second stage data encryption engine of 64-bits. The input bus of the first stage is gated to a plurality of 8-bit registers through a plurality of AND gates having a respective one of the AND gate inputs in communication with the 8-bit bus and output from the respective AND gate directed to a respective input of the respective 8-bit registers for selectively gating data from the 8-bit bus to respective ones of the 8-bit registers. A demultiplexer includes a plurality of inputs and a plurality of outputs, a respective output of the demultiplexer being in communication with the input of a respective one of the AND gates for selectively enabling a respective one of the AND gate in response to the state of the control signals.
REFERENCES:
patent: 5333198 (1994-07-01), Houlberg et al.
Barraza Thomas F.
Lee Young W.
Moh Sung-won
Muller Arno
Chaclas Angelo N.
Gregory Bernarr E.
Pitney Bowes Inc.
Scolnick Melvin J.
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