Illegal copy prevention apparatus

Details Illegal copy prevention apparatus Illegal copy prevention apparatus

1991-12-05

1994-03-15

Buczinski, Stephen C.

Cryptography

Cryptanalysis

380 3, G11B 2328, G05B 902

Patent

active

052951871

ABSTRACT:
An illegal copy prevention apparatus including a plurality of illegal copy discriminators (e.g. instructions to set flags), an event generator (e.g. detections of "0" sec in real time) corresponding to the illegal copy discriminators, and an abnormal operation generator for generating an abnormal operation when any one of the illegal discriminator and the corresponding event generator generates an event. Since the probability at which all the abnormal operations are generated by all the abnormal operation generators is low, it is extremely difficult for a violator to notice the presence of all the copy protections and further remove all the copy protections completely, thus realizing an effective illegal copy prevention apparatus for computer software and circuit configuration of IC devices.

REFERENCES:
patent: 4583011 (1986-04-01), Pechar
patent: 4584641 (1986-04-01), Guglielmino
patent: 4685055 (1987-08-01), Thomas
patent: 4766516 (1988-08-01), Ozdemir et al.
patent: 4905277 (1990-02-01), Nakamura

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