Secure and Self-stabilizing Clock Synchronization in Sensor Networks

Hoepman, Jaap-HenkRadboud Universiteit,Radboud University,Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek (TNO),Netherlands Organisation for Applied Scientific Research (TNO) (författare)

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 an efficient clock sampling algorithm which tolerates attacks by this adversary, collisions, a bounded amount of losses due to ambient noise, and a bounded number of captured nodes that can jam, intercept, and send fake messages. The algorithm is self-stabilizing, so if these bounds are temporarily violated, the system can efficiently stabilize back to a correct state. Using this clock sampling algorithm, we construct the first self-stabilizing algorithm for secure clock synchronization in sensor networks that is resilient to the aforementioned adversarial attacks.

Larsson, Andreas,1979Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)larandr (författare)
Schiller, Elad,1974Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)elad (författare)
Tsigas, Philippas,1967Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)tsigas (författare)
Radboud UniversiteitNederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek (TNO) (creator_code:org_t)

Av författaren/redakt...: Hoepman, Jaap-He ...; Larsson, Andreas ...; Schiller, Elad, ...; Tsigas, Philippa ...

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