[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 [5][ISMAP:i] [6][arXivblog?d=41] [7][arXivblog?d=43] [8][arXivblog?i=T8IvmQ0Z] [9][arXivblog?d=50] [10][arXivblog?i=h4NffYqK] [11][arXivblog?d=54] [12][arXivblog?i=cEazSrgL] [13][arXivblog?d=52] You are subscribed to email updates from [14]the physics arXiv blog To stop receiving these emails, you may [15]unsubscribe now. Email delivery powered by Google Inbox too full? [16](feed) [17]Subscribe to the feed version of the physics arXiv blog in a feed reader. If you prefer to unsubscribe via postal mail, write to: the physics arXiv blog, c/o Google, 20 W Kinzie, Chicago IL USA 60610 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/ 15. http://feedburner.google.com/fb/a/mailunsubscribe?k=118r9-S4Z0vJg-AkQPASPmDm... 16. http://feedproxy.google.com/arXivblog 17. http://feedproxy.google.com/arXivblog ----- End forwarded message ----- -- Eugen* Leitl <a href="http://leitl.org">leitl</a> http://leitl.org ______________________________________________________________ ICBM: 48.07100, 11.36820 http://www.ativel.com http://postbiota.org 8B29F6BE: 099D 78BA 2FD3 B014 B08A 7779 75B0 2443 8B29 F6BE