Method to deter document and intellectual property piracy through individualization
AssigneeInternational Business Machines Corporation
InventorsChee-Seng Chow, Shay Kutten, Marcell Mordechay Yung
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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.
Claims22
A copy protection system for detecting unauthorized copying or distribution of a document, said system comprising:
- a. means for generating a plurality of variants of said document, each variant of said document being generated by applying a particular set of variations to said document, where each variation is a change in the contents of said document but is not a modification in the meaning or perusal experience of said document;
- b. a means for maintaining a database associating each of said variants of said document with a receiver;
- and
- c. a means for identifying a receiver of any one variant of said document using said database, wherein unauthorized copying or distribution of said document can be traced to said receiver according to which variant of said document was copied or distributed without authorization.
A copy protection system for detecting unauthorized copying or distribution of a document, said system comprising:
- a. means for associating a receiver of said document with information associated with said receiver;
- and
- b. hashing said information to a sequence of tagging vits;
- and
- c. preparing variants of said document in accordance with said sequence, wherein unauthorized copying or distribution of said document can be traced to said receiver according to which of said variants of said document was copied or distributed without authorization, wherein each of said variants is a variation of said document, where each variation is a change in the content of said document.
A copy protection system comprising:
- a. means for associating a document receiver using information associated with said receiver;
- b. hashing said information to a sequence of tagging vits;
- c. preparing variants of said document in accordance with said sequence, wherein unauthorized copying or distribution of said document can be traced to said receiver according to which of said variants of said document was copied or distributed without authorization, wherein each of said variants is a variation of said document, where each variation is a change in the content of said document;
- and
- d. means for providing cryptographic authentication of variants to said sequence of tagging vits via cryptographic authentication of said sequence of chosen vits to detect modifications of said variants of said document.
Dependencies are inferred from the claim text.