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[the physics arXiv blog]

[1]the physics arXiv blog

   [2]Steganophony-when internet telephony meets steganography

   Posted: 27 Nov 2008 09:30 PM PST

   [3]steganophony.jpg 

   Steganophony is the term coined by Wojciech Mazurczyk and Jzef Lubacz
   at the Warsaw University of Technology in Poland to describe the
   practice of hiding messages in internet telephony traffic (presumably
   the word is an amalgamation of the terms steganography and telephony).

   The growing interest in this area is fueled by the fear that terrorist
   groups may be able to use services such as Skype to send messages
   secretly by embedding them in the data stream of internet telephony.
   At least that's what Mazurczyk and Lubacz tell us.

   The pair has developed a method for doing exactly that called Lost
   Audio PaCKets Steganography or LACKS and outline it on the arXiv
   today.

   LACKS exploits a feature of internet telephony systems: they ignore
   data packets that are delayed by more than a certain time. LACKS
   plucks data packets out of the stream, changes the information they
   contain and then sends them on after a suitable delay. An ordinary
   receiver simply ignores these packets if they arrive after a certain
   time but the intended receiver collates them and extracts the
   information they contain.

   That makes LACKS rather tricky to detect since dropped packets are a
   natural phenomenon of the internet traffic.

   But is this really an area driven by the threat of terrorism? If
   anybody really wants to keep messages secret then there are plenty of
   easier ways to do it, such as Pretty Good Privacy.

   There's a far more powerful driver for this kind of work. It's name?
   Paranoia

   Ref: [4]arxiv.org/abs/0811.4138: LACK a VoIP Steganographic Method

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References

   1. http://arxivblog.com/
   2. http://feedproxy.google.com/~r/arXivblog/~3/6lCv8Iiibpw/
   3. http://arxivblog.com/wp-content/uploads/2008/11/steganophony.jpg
   4. http://arxiv.org/abs/0811.4138
   5. https://feedads.googleadservices.com/~a/6eeH_4hq5ApO1HpULd8NL4ChEWk/a
   6. http://feedproxy.google.com/~f/arXivblog?a=fEO0PUGu
   7. http://feedproxy.google.com/~f/arXivblog?a=wdGMyQNE
   8. http://feedproxy.google.com/~f/arXivblog?a=T8IvmQ0Z
   9. http://feedproxy.google.com/~f/arXivblog?a=ShG5N5nk
  10. http://feedproxy.google.com/~f/arXivblog?a=h4NffYqK
  11. http://feedproxy.google.com/~f/arXivblog?a=A7z74bGw
  12. http://feedproxy.google.com/~f/arXivblog?a=cEazSrgL
  13. http://feedproxy.google.com/~f/arXivblog?a=3X6kmeSB
  14. http://arxivblog.com/
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  16. http://feedproxy.google.com/arXivblog
  17. http://feedproxy.google.com/arXivblog

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