Document copying deterrent method using line and word shift tech

Details Document copying deterrent method using line and word shift tech Document copying deterrent method using line and word shift tech

1995-03-31

1997-05-13

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358404, 380 4, 380 51, 380 55, 380 56, 399366, 399183, H04N 1419, G09C 106

Patent

active

056297700

ABSTRACT:
A method is provided that deters the illicit copying of electronically published documents. It includes publishing a plurality of copies of electronically created material to be distributed to a plurality of subscribers. Each copy of subscriber's document has a unique identification code embedded in the document. The arrangement of the code on the document is based on the line-shifting and word-shifting techniques. This is to minimize the effects from noise and distortions on future illicit copies to simplify detection and decoding of the unique code. A codebook is created to correlate each unique code with each subscriber.

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