The first BOWS contest: Break Our Watermarking System

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Abstract
In the framework of the activities carried out by the European Network of Excellence for Cryptology ECRYPT, a 4-year network of excellence funded within the Information Societies Technology (IST) Programme of the European Commission's Sixth Framework Programme (FP6), it was proposed to launch the BOWS Contest. BOWS, acronym of Break Our Watermarking System, was designed to allow to investigate how and when an image watermarking system can be broken though preserving the highest possible quality of the modified content, in case that the watermarking system is subjected to a world-wide attack. BOWS contest was not intended as an attempt to prove how well-performing a watermarking system is, but it was expected by means of this test to better understand which are the disparate possible attacks, perhaps unknown at the moment of the start of the contest, the BOWS participants could carry out to perform their action and comprehend in this way the degree of difficulty of breaking the embedded watermark. This paper describes how the Contest has been designed and analyzes the general progress of the attacks during the Contest.

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