Boots – shoes – and leggings
Patent
1977-10-21
1980-01-08
Shaw, Gareth D.
Boots, shoes, and leggings
G06K 500, G06K 700
Patent
active
041830857
ABSTRACT:
A data processing system is described which issues value documents e.g. tickets or information under the control of output instructions and is designed to prevent a person attempting fraud using an unauthorized program obtaining the value documents or information. The system includes a data processor controlling output units which can issue value documents or information and data storage. The data storage is divided into a secure store containing the output instructions arranged to make tampering difficult and a free storage into which an operator may load a program. Security logic is provided to check that an output instruction has originated in the secure store and to prevent operation of an output unit which receives output instructions from free storage. This makes it difficult for a person attempting fraud to produce value documents or information by loading a program into free storage.
The secure storage is preferably a read only store programmed during manufacture. When secure and free storage share a common memory bus, the security logic monitors addresses used to fetch instructions.
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patent: 3764742 (1973-10-01), Abbott et al.
patent: 3916385 (1975-10-01), Parmar et al.
patent: 3931504 (1976-01-01), Jacoby
patent: 3941977 (1976-03-01), Voss et al.
patent: 3943335 (1976-03-01), Kinker et al.
patent: 4109238 (1978-08-01), Creekmore
Roberts David J.
Simmons John
Bartz C. T.
Goldman Bernard M.
International Business Machines - Corporation
Shaw Gareth D.
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