Re: [WM]: an attack to text watermarking

[Umut Topkara <utopkara@cs.purdue.edu>]

There is also a large body of research about modifying the content of the text, such that the watermark stays even if the text is
re-transcribed using a pen, or OCR.

We have a group specialized in text information hiding at Purdue Computer Science Departmet. Here are the two most recent papers
that we have published:

U. Topkara, M. Topkara, M. J. Atallah,  "The Hiding Virtues of Ambiguity: Quantifiably Resilient Watermarking of Natural Language
Text through Synonym Substitutions" , Proceedings of ACM Multimedia and Security Workshop, Geneva, Switzerland, September 26-27,
2006.
http://portal.acm.org/citation.cfm?id=1161366.1161397

M. Topkara, U. Topkara, M. J. Atallah, "Words Are Not Enough: Sentence Level Natural Language Watermarking", Proceedings of ACM
Workshop on Content Protection and Security (in conjuction with ACM Multimedia), Santa Barbara, CA, October 27, 2006.


Here's a collection of related papers that Mercan Topkara
maintains:
http://homes.cerias.purdue.edu/~mercan/
Bests,

Umut Topkara
http://www.cs.purdue.edu/homes/utopkara


shijun xiang wrote:
> Dear Stephen Chou,
> 
> Usually, the text watermarking is performed by modified the structure 
> of the original document, such as reassigning the distance among 
> words, lines, etc. since you in no way know the information of the 
> original document. The transcribed document by an attacker often 
> include the watermark because you don't know how to rewrite the 
> document to destroy the watermark. In other words, if the transcribed 
> document manually is published somewhere, the copyright owner may 
> extract the hidden messages from the document. As a result, the 
> transcribed document will be identified as the illegal.
> 
> 
> 
> On 12/5/06, *Stephen Chou* <zjunh2002@gmail.com 
> <mailto:zjunh2002@gmail.com>> wrote:
> 
>     Dear all,
>     I have one basic question to text watermarking.
> 
>     A document is watermarked before publication. if the watermarked doc
>     is transcribed manually by a person, that is, he uses a pen to
>     write down the document into a paper, he may publish the transcribed
>     paper for his sake. I am wondering the watermarking tech can
>     resist such an attack?
> 
>     Thanks
>                        ; Stephen


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