Method of preventing videotape piracy

Details Method of preventing videotape piracy Method of preventing videotape piracy

1995-05-22

1997-11-04

Cangialosi, Salvatore

Cryptography

By modifying optical image

380 5, 273139, H04L 900

Patent

active

056848773

ABSTRACT:
A method of preventing videotape piracy by including on authorized copies of a videotape a designator of authenticity and a code which serves as a lottery number.

REFERENCES:
patent: 4601239 (1986-07-01), Sillars
patent: 4832341 (1989-05-01), Muller et al.
patent: 4993714 (1991-02-01), Golightly
patent: 5128779 (1992-07-01), Mallik
patent: 5360235 (1994-11-01), Drummeter et al.

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