System for protection of software

Details System for protection of software System for protection of software

G - Physics

06

F

G06F 12/14 (2006.01) G11B 5/09 (2006.01) G11B 20/00 (2006.01) G06F 1/00 (2006.01)

Patent

CA 2133960

2133960 9321582 PCTABS00027 A system for protecting (10) computer software against unauthorized copying or use includes writing to and reading (47) from storage media such as diskettes (10) and determining whether the storage medium is authorized based upon the results of the write/read (47) operation (436-446, 464-466). In a preferred embodiment, a software medium (30) is prepared for distribution (10) of an application program by writing a scrambled version of the application program (40) and an install program (20) that determines whether the medium is authorized by evaluating bad spots (434) in the medium. A similar mechanism protects against unauthorized copying of an application form a hard disk (418) drive or a computer's memory. The system provides a simple software-based mechanism (46) for turning it on another computer. The system provides for emergency use (44) of the application program in the event that the authorized distribution medium (10) becomes unusable.

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