Design and Analysis of an Attack Resilient and Adaptive Medium access Control Protocol for Computer Networks

Details Design and Analysis of an Attack Resilient and Adaptive Medium access Control Protocol for Computer Networks Design and Analysis of an Attack Resilient and Adaptive Medium access Control Protocol for Computer Networks

2009-07-03

arxiv.org/abs/0907.0678v1

IJCSIS May 2009 Issue, Vol. 1, No. 1

Computer Science

Cryptography and Security

10 pages, International Journal of Computer Science and Information Security

Scientific paper

The challenge of designing an efficient Medium Access Control (MAC) protocol and analyzing it has been an important research topic for over 30 years. This paper focuses on the performance analysis (through simulation) and modification of a well known MAC protocol CSMA/CD. The existing protocol does not consider the wastage of bandwidth due to unutilized periods of the channel. By considering this fact, performance of MAC protocol can be enhanced. The purpose of this work is to modify the existing protocol by enabling it to adapt according to state of the network. The modified protocol takes appropriate action whenever unutilized periods detected. In this way, to increase the effective bandwidth utilization and determine how it behaves under increasing load, and varying packet sizes. It will also include effects of attacks i.e. Denial of service attacks, Replay Attack, Continuous Channel Access or Exhaustion attack, Flooding attack, Jamming (Radio interference) attack, Selective forwarding attack which degrade performance of MAC protocol. In Continuous Channel Access or Exhaustion attack, a malicious node disrupts the MAC protocol, by continuously requesting or transmitting over the channel. This eventually leads a starvation for other nodes in the network w.r.t channel access. remedy may be the network ignores excessive requests without sending expensive radio transmissions. This limit however cannot drop below the expected maximum data rate the network has to support. This limit is usually coded into the protocol during the design phase and requires additional logic also. Repeated application of these exhaustion or collision based MAC layer attacks can lead into unfairness.

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