Method to deter document and intellectual property piracy throug

Details Method to deter document and intellectual property piracy throug Method to deter document and intellectual property piracy throug

1995-06-23

1997-12-16

Cain, David C.

Cryptography

Cryptanalysis

380 55, G11B 2328

Patent

active

056994273

ABSTRACT:
A system for identifying the authorized receiver of any particular copy of a document. More specifically, each particular copy of a document is fingerprinted by applying a set of variations to a document, where each variation is a change in data contents, but does not change the meaning or perusal experience of the document. A database associating a set of variants to a receiver is maintained. Thus any variant or copy of that variant can be traced to an authorized receiver.

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patent: 5460374 (1995-10-01), Owaki
patent: 5467447 (1995-11-01), Vogel
patent: 5513169 (1996-04-01), Fite et al.
patent: 5513260 (1996-04-01), Ryan
patent: 5530757 (1996-06-01), Krawczyk
patent: 5568550 (1996-10-01), Ur
patent: 5627655 (1997-05-01), Okamoto et al.

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