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Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Design and Analysis of the First BOWS Contest | Hindawi Publishing Corporation EURASIP Journal on Information Security Volume 2007 Article ID 98684 8 pages doi 10.1155 2007 98684 Research Article Design and Analysis of the First BOWS Contest A. Piva1 and M. Barni2 1 Department of Electronics and Telecommunications University of Florence 50139 Florence Italy 2 Department of Information Engineering University of Siena 53100 Siena Italy Correspondence should be addressed to A. Piva piva@lci.det.unifi.it Received 20 June 2007 Accepted 29 August 2007 Recommended by F. Perez-Gonzalez The break our watermarking system BOWS contest was launched in the framework of the activities carried out by the European Network of Excellence for Cryptology ECRYPT. The aim of the contest was to investigate how and when an image watermarking system can be broken while preserving the highest possible quality of the content in the case the watermarking system is subject to a massive worldwide attack. The great number of participants and the echo that the contest has had in the watermarking community contributed to make BOWS a great success. From a scientific point of view many insights into the problems attackers have to face with when operating in a practical scenario have been obtained confirming the threat posed by the sensitivity attack which turned out to be the most successful attack. At the same time several interesting modifications of such an attack have been proposed to make it work in a real scenario under limited communication and time resources. This paper describes how the contest has been designed and analyzes the general progress of the attacks during the contest. Copyright 2007 A. Piva and M. Barni. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. INTRODUCTION The first break our watermarking system BOWS contest has been organized by the Watermarking Virtual
