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Machine translation
1. (WO1981002351) DIGITAL COMPUTER
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1981/002351    International Application No.:    PCT/US1981/000084
Publication Date: 20.08.1981 International Filing Date: 22.01.1981
IPC:
G06F 21/00 (2006.01), G06F 1/00 (2006.01)
Applicants:
Inventors:
Priority Data:
118003 04.02.1980 US
Title (EN) DIGITAL COMPUTER
(FR) ORDINATEUR NUMERIQUE
Abstract: front page image
(EN)The architecture of a conventional digital computer, for example, a microprocessor, is modified by interposing a multiplexer (31), a logic array (32) and a demultiplexer (33) between the instruction register (17) and instruction decoder (18). The logic array "scrambles" the bits in each instruction code; however, if the program to be run is priorly encrypted with this "scrambling" in mind, it will ran normally. On the other hand, if the encrypted program is copied, the copied program will not run on an unmodified computer.
(FR)L'architecture d'un ordinateur numerique conventionnel, par exemple, un microprocesseur, est modifiee en intercalant un multiplexeur (31), une rangee logique (32) et un demultiplexeur (33) entre le registre d'instructions (17) et le decodeur d'instructions (18). La rangee logique "brouille" les bits dans chaque code d'instruction; toutefois, si le programme a executer est code au prealable en fonction du brouillage, il sera execute normalement. D'autre part si le programme code est copie, le programme copie ne pourra pas etre execute par un ordinateur non modifie.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)