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Evaluation of the Severity of DoS Attacks on Computer Networks

Authors:
Amar Aissani
Maroua Yaiche-Achour

Keywords: Security; Queueing; Reliability; DoS Attack.

Abstract:
In this paper, we derive stochastic recursive equations describing the evolution of a computer network under Denial-Of-Service (DoS) attacks (flooding attacks). The queue has several input processes, (i) the regular one (control packet flow and background or non control applications), which describes the input under network normal status; and (ii) the attack packet flow. We concentrate on some particular security measures, namely, the load or the loss probability. The load is strongly connected with the stability, which is understood as the convergence of the underlying stochastic process to a unique stationary ergodic regime. Loss of packets can occur although the system is stable. There are no specific requirements regarding statistical assumptions for establishing such equations. However, in order to derive stability condition and stationary performance measures we will need assumptions like stationarity and ergodicity (the independence is not required). Finally, we provide some numerical illustrations showing the effect of parameters on security measures and thus the severity of such attacks.

Pages: 8 to 13

Copyright: Copyright (c) IARIA, 2012

Publication date: April 29, 2012

Published in: conference

ISSN: 2308-3700

ISBN: 978-1-61208-198-4

Location: Chamonix, France

Dates: from April 29, 2012 to May 4, 2012