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Inhibiting the Use of Illegally Copied Programs Disclosure Number: IPCOM000061413D
Original Publication Date: 1986-Jun-01
Included in the Prior Art Database: 2005-Mar-09

Publishing Venue


Related People

Lorie, RA Mantey, PE [+details]


A method is described for inhibiting the use of illegally copied programs by requiring the use of an encoded card to enable the execution of a program, comprising the steps of (a) recording a pertinent portion of the program in scrambled format, (b) detecting the data in the scrambled area during execution, (c) unscrambling the fetched data with the information on the encoded c and (d) tracing a sequence of addresses being fetched during execution.