[ISS] Seminario 1 giugno ore 11.30

[Giuseppe Bianchi < >]

Ecco i dettagli del seminario che terremo durante la lezione di
mercoledi' 1 giugno del corso di sicurezza delle reti. Si parla di
covert channels, quindi (in un certo senso) steganografia, cosa che non
ho specificatamente trattato nel corso e quindi da sentire!

Saluti, GB

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Title: "Chupja - PHY Covert Channels: Can you see the Idles?"

Abstract:
Network covert timing channels embed secret messages in legitimate
packets by modulating interpacket delays. Such channels are normally
implemented in higher network layers (layer 3 or above), are often
fairly slow, and can be easily detected or prevented. In this talk, I
will present a new approach, Chupja (Korean for spy), which is a very
effective covert timing channel that works over the Internet. It is
implemented in the physical layer of the network stack and is many
orders of magnitude faster than prior art while being very robust and
virtually invisible to software endhosts. Key to our approach is
software and real-time access and control over every bit in the physical
layer of a 10 Gigabit network stack (a bit is 100 picoseconds wide at 10
gigabit per seconds), which allows us to modulate and interpret
interpacket spacings at sub-microsecond scale. In the talk, I will
discuss when and how a timing channel in the physical layer works, how
hard it is to detect such a channel, and what is required to do so.

Bio:
Hakim Weatherspoon is an Associate Professor in the Department of
Computer Science at Cornell University.  He is on a one year sabbatical
at the University of Cambridge, Computer Laboratory.   His research
interests cover various aspects of fault-tolerance, reliability,
security, and performance of large Internet-scale (and rack-scale!)
systems such as cloud computing and distributed systems.  He received
his Ph.D. from University of California at Berkeley and B.S. from
University of Washington.  He is an Alfred P. Sloan Fellow and recipient
of an NSF CAREER award, DARPA Computer Science Study Panel (CSSP), IBM
Faculty Award, the NetApp Faculty Fellowship, Intel Early Career Faculty
Honor, and the Future Internet Architecture award from the National
Science Foundation (NSF).

More information about Hakim is available online at his research group
website http://fireless.cs.cornell.edu and/or personal website
http://www.cs.cornell.edu/~hweather