Secure and Self-stabilizing Clock Synchronization in Sensor Networks
Artikel i vetenskaplig tidskrift, 2010

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.


Sensor-network systems

Secure and resilient computer systems



Jaap-Henk Hoepman

Radboud University Nijmegen

Nederlandse Organisatie voor toegepast natuurwetenschappelijk onderzoek- TNO

Andreas Larsson

Chalmers, Data- och informationsteknik, Nätverk och system

Elad Schiller

Chalmers, Data- och informationsteknik, Nätverk och system

Philippas Tsigas

Chalmers, Data- och informationsteknik, Nätverk och system

Theoretical Computer Science

0304-3975 (ISSN)



Informations- och kommunikationsteknik


Building Futures


Datavetenskap (datalogi)