OpenChaos/Hacking Digital Watermarks

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by Tim TimeWaster tim@timit.nl

Slides

http://w8n.koeln.ccc.de/media/slides/oc_watermark_21102005.pdf

klaphek projects

commercial break Klaphek, a cool hacker magazine and group

Bluetooth http://thetoy.co.uk is your wet dream
prepeaid web-only GPRS
smartcards & magstripe cards
whatever we encouter on our way

Digital Watermarks

DWM: "inivisible" information embedded in data

Examples:

use LSBs (low significant bits)
add high freq (pseudo ) nouse / spread
echo watermark
MPEG stream watermarking

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