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Secure and Self-stabilizing Clock Synchronization in Sensor Networks

Jaap-Henk Hoepman ; Andreas Larsson (Institutionen för data- och informationsteknik, Nätverk och system, Datakommunikation och distribuerade system (Chalmers)) ; Elad Michael Schiller (Institutionen för data- och informationsteknik, Nätverk och system, Datakommunikation och distribuerade system (Chalmers)) ; Philippas Tsigas (Institutionen för data- och informationsteknik, Nätverk och system, Datakommunikation och distribuerade system (Chalmers))
Prooceedings of the 9th Scandinavian Workshop on Wireless Ad-hoc Networks (Adhoc 2009) p. 78-82. (2009)
[Konferensbidrag, refereegranskat]

In sensor networks, correct clocks have arbitrary starting offsets and nondeterministic fluctuating skews. We consider an adversary that aims at tampering with the clock synchronization by intercepting messages, replaying intercepted messages (after the adversary's choice of delay), and capturing nodes (i.e., revealing their secret keys and impersonating them). We present the first self-stabilizing algorithm for secure clock synchronization in sensor networks that is resilient to such an adversary's attacks. Our algorithm tolerates random media noise, guarantees with high probability efficient communication overheads, and facilitates a variety of masking techniques against pulse-delay attacks in the presence of captured nodes.



Denna post skapades 2009-05-29. Senast ändrad 2014-11-10.
CPL Pubid: 94529