Copy detection for digitally-formatted works

Details Copy detection for digitally-formatted works Copy detection for digitally-formatted works

2007-06-05

2007-06-05

Fischer, Andrew J. (Department: 3621)

Data processing: financial, business practice, management, or co

Business processing using cryptography

Usage protection of distributed data files

C705S056000, C705S058000, C705S001100, C380S243000, C713S001000

Reexamination Certificate

active

10943190

ABSTRACT:
An electronic book reader has a processor, a display surface, and access to a memory card upon which is stored a digitally-formatted creative work such as a book. In addition, the reader has access to a plurality of precompiled condensed content descriptions of respective books that are subject to copy restrictions. Before reading a given book, the reader creates a condensed content description of the book and compares it to the stored descriptions to determine whether the book is subject to copy restrictions. If it is, the reader checks for a valid license before allowing the user to read the book.

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