Copy protection for data processing programs

Method of protecting a program which is stored on a magnetic, optical, opto-magnetic, electronic or mechanical data storage medium from unauthorised copying. During and/or after manufacture the data storage medium (1) is altered in a pre-defined way, in at least one place (4), compared to its physic...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	KEESE,THOMAS
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	CALCULATING COMPUTING COUNTING ELECTRIC DIGITAL DATA PROCESSING INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER PHYSICS
Online-Zugang:	Volltext bestellen
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Beschreibung
Zusammenfassung:	Method of protecting a program which is stored on a magnetic, optical, opto-magnetic, electronic or mechanical data storage medium from unauthorised copying. During and/or after manufacture the data storage medium (1) is altered in a pre-defined way, in at least one place (4), compared to its physical and/or chemical properties in the rest of its area. The program to be protected has a test routine, which can be used to interrogate the affected part (4) of the data storage medium (1). If there is a deviation in the physical and/or chemical properties of the interrogated place (4) from the pre-defined physical and/or chemical properties, a program protection routine is triggered.