Publication Type

Conference Proceeding Article

Version

publishedVersion

Publication Date

10-2003

Abstract

In this paper, we propose an adaptive collusion attack to a block oriented watermarking scheme [1]. In this attack, traitors conspire to selectively manipulate watermarked blocks to remove the watermark information. To this end, the traitors compare the watermarked blocks generated from the same original block. If two watermarked block are not equal, they average these two blocks to generate a pirated block. Then, replace the watermarked blocks with the pirated blocks so as to build a pirated image. The pirated image has no watermark but has much higher quality than watermarked images. We also give a theoretical analysis on the probability of successful traitor tracing. Both theoretical and experimental results demonstrate that our attack is very effective when four or more traitors are involved in the collusion attack. In the cases of less than four traitors, we show how to integrate our collusion attack with an adaptive random attack to improve the qualities of pirated images as well as to defeat the tracer.

Keywords

Watermark Scheme, Image Block, Digital Watermark, Collusion Attack, Watermark Information

Discipline

Information Security

Research Areas

Cybersecurity

Publication

Information and Communications Security: 5th International Conference, ICICS 2003, Huhehaote, China, October 10-13

Volume

2836

First Page

238

Last Page

248

ISBN

9783540399278

Identifier

10.1007/978-3-540-39927-8_22

Publisher

Springer

City or Country

Berlin

Copyright Owner and License

Publisher

Additional URL

https://doi.org/10.1007/978-3-540-39927-8_22

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