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Enhanced Timestamp Discrepancy to Limit Impact of Replay Attacks in MANETs
Laboratory SI2M, ENSIAS, University of Mohammed-V-Souissi, Rabat, Morocco
Laboratory LaRIT, Faculty of Sciences, University of Ibn Tofail, Kenitra, Morocco
Laboratory SI2M, ENSIAS, University of Mohammed-V-Souissi, Rabat, Morocco
- 1 Laboratory SI2M, ENSIAS, University of Mohammed-V-Souissi, Rabat, Morocco
- 2 Laboratory LaRIT, Faculty of Sciences, University of Ibn Tofail, Kenitra, Morocco
- 3 Laboratory SI2M, ENSIAS, University of Mohammed-V-Souissi, Rabat, Morocco
Journal of Information Security·Volume 03 (2012)·Pages 224–230·Published 25 July 2012·DOI10.4236/jis.2012.33028
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Abstract
Mobile Ad hoc NETworks (MANETs), characterized by the free move of mobile nodes are more vulnerable to the trivial Denial-of-Service (DoS) attacks such as replay attacks. A replay attacker performs this attack at anytime and anywhere in the network by interception and retransmission of the valid signed messages. Consequently, the MANET performance is severally degraded by the overhead produced by the redundant valid messages. In this paper, we propose an enhancement of timestamp discrepancy used to validate a signed message and consequently limiting the impact of a replay attack. Our proposed timestamp concept estimates approximately the time where the message is received and validated by the received node. This estimation is based on the existing parameters defined at the 802.11 MAC layer.
KeywordsMANETReplay AttackDenial-of-Service (DoS)802.11 MAC LayerNetwork Allocation Vector (NAV)Security Countermeasure
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