Document copying deterrent method

Details Document copying deterrent method Document copying deterrent method

1993-12-20

2000-07-11

Dixon, Merrick

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

235375, 235385, 235454, 283901, 360 331, 360 46, B32B 3100

Patent

active

06086706&

ABSTRACT:
The present invention is directed to a method of deterring the illicit copying of electronically published documents. It includes utilizing a computer system to electronically publish a plurality of copies of a document having electronically created material thereon for distribution to a plurality of subscribers and operating programming within the computer system so as to perform the identification code functions. The steps are to encode the plurality of copies each with a separate, unique identification code, the identification code being based on a unique arrangement of the electronically created material on each such copy; and, creating a codebook to correlate each such identification code to a particular subscriber. In some embodiments, decoding methods are included with the encoding capabilities. The unique arrangement of the electronically created material may be based on line-shift coding, word-shift coding, or feature enhancement coding (or combinations of these) and may be effected through bitmap alteration of document format file alteration.

REFERENCES:
patent: 4837425 (1989-06-01), Edwards
patent: 4983817 (1991-01-01), Dolash et al.
patent: 5047864 (1991-09-01), Fujito
patent: 5097348 (1992-03-01), Suetaka
patent: 5363202 (1994-11-01), Udgawa et al.
patent: 5367148 (1994-11-01), Storch
patent: 5388194 (1995-02-01), Vogel

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