[WM]: Ecrypt BOWS Contest (Break Our Watermarking System)

[Alessandro Piva <piva@lci.det.unifi.it>]

Dear watermarker, watermark-breakers, pirates and hackers,

I would like to remind you that the BOWS contest is open.
As the acronym says (BOWS = Break Our Watermarking System), the contest= , that is organised within the framework of the Ecrypt
project (http://www.ecrypt.eu.org/), is a contest among watermark-breakers that are required to remove the watermark from three
images available on the interent.

An image watermarking algorithm has been chosen to be the object of the contest. Three different generic images, in raw format and
size 512x512, watermarked with this system are made available for download on the
“BOWS” web-site. Then, contenders can try to erase the watermark from all the three images by using any action they want while
granting a minimum PSNR (Peak-Signal-to-Noise-Ratio) of 30 dB between the watermarked image and the attacked one. To verify their
action, attackers can upload the attacked images (in raw format and size
512x512) on the BOWS web-site through an ad-hoc interface and ask to run the detection process; finally they obtain as answer the
result of the detection and the PSNR achieved. The attacker who will be able to remove the watermark from all the three images with
the highest (on the
average) PSNR will win the contest and receive a prize.
The Contest started on December 15, 2005, and will end on March 15, 2006.
Since the start of the Contest, we have received 800 Attacked Images, with 9 successful trials on the Strawberry image only (last
update:
January 13, 2006). Try again!

More information on the Contest in the website at http://lci.det.unifi.it/BOWS/

Best regards,


Alessandro Piva

--
***************************************************************
Alessandro Piva
Assistant Professor
Department of Electronics and Telecommunications University of Florence Via S. Marta 3, 50139 Firenze, Italy
Phone:  +39 055 4796389
Fax:    +39 055 494569
E-mail: piva@lci.det.unifi.it
URL:    http://lci.det.unifi.it/Staff/Piva



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