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SUMMARY:Chupja--PHY Covert Channels: Can you see the Idles? - Hakim Weathe
 rspoon\, assistant professor\, Department of Computer Science\, Cornell Un
 iversity
DTSTART:20150331T130000Z
DTEND:20150331T140000Z
UID:TALK58446@talks.cam.ac.uk
CONTACT:Laurent Simon
DESCRIPTION:*Abstract:*\nNetwork covert timing channels embed secret messa
 ges 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 ve
 ry effective covert timing channel that works over the Internet. It is imp
 lemented in the physical layer of the network stack and is many orders of 
 magnitude faster than prior art while being very robust and virtually invi
 sible 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 ne
 twork stack (a bit is 100 picoseconds wide at 10 gigabit per seconds)\, wh
 ich allows us to modulate and interpret interpacket spacings at sub-micros
 econd 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.\n \n*Bio:*\nHakim Weatherspoon is an assistant 
 professor in the Department of Computer Science at Cornell University.  Hi
 s research interests cover various aspects of fault-tolerance\, reliabilit
 y\, security\, and performance of large Internet-scale systems such as clo
 ud computing and distributed systems. Professor Weatherspoon received his 
 Ph.D. from Berkeley in 1999.  Before receiving his PhD\, Prof. Weatherspoo
 n received his B.S. from University of Washington.  Prof. Weatherspoon is 
 an Alfred P. Sloan Fellow and recipient of an NSF CAREER award\, DARPA Com
 puter Science Study Panel (CSSP)\, IBM Faculty Award\, the NetApp Faculty 
 Fellowship\, Intel Early Career Faculty Honor\, and the Future Internet Ar
 chitecture award from the National Science Foundation (NSF).
LOCATION:LT2\, Computer Laboratory\, William Gates Building
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