Difference between revisions of "OpenChaos/Hacking Digital Watermarks"

From C4 Wiki
Jump to: navigation, search
Line 1: Line 1:
 
by Tim TimeWaster tim@timit.nl
 
by Tim TimeWaster tim@timit.nl
 +
=== Slides ===
 +
[[http://w8n.koeln.ccc.de/media/slides/oc_watermark_21102005.pdf]]
  
 
===klaphek projects===
 
===klaphek projects===

Revision as of 21:33, 21 October 2005

by Tim TimeWaster tim@timit.nl

Slides

[[1]]

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