Abstract
Cellular networks are a critical component of the
economic and social infrastructures in which we live. In addition to voice
services, these networks deliver alphanumeric text messages to the vast
majority of wireless subscribers. To encourage the expansion of this new
service, telecommunications companies offer connections between their networks
and the Internet. The ramifications of such connections, however, have not been
fully recognized. In this paper, we evaluate the security impact of the SMS
interface on the availability of the cellular phone network.
The analysis begins
with an exploration of the structure of cellular networks. We then characterize
network behaviour and explore a number of reconnaissance techniques aimed at
effectively targeting attacks on these systems. This paper describes in
detail about the vulnerabilities due to
DOS (Denial Of Services) attacks. The major problem seen in this method is
overflow of the buffer. To overcome the above problem, we have proposed a new
idea of Weighted Fair Queuing. We
conclude by discussing countermeasure that mitigate or eliminate the threats
introduced by these attacks.
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