January 20, 2011
Thwarting Attacks On Cell Phone Mesh Networks
No longer in denial -- tracing and blocking DDoS attacks on mobile ad hoc networks
A Mobile Ad hoc NETwork (MANET) or cell phone mesh network uses software to transparently hook together numerous active cell phones in a location to provide greater bandwidth and better network connections by allowing users to share "spare" resources while they use their phones, making data transfers faster and smoother.
Now, Yinghua Guo of the Defence and Systems Institute, at the University of South Australia, in Mawson Lakes and Sylvie Perreau of the Institute for Telecommunications Research, in Mawson Lakes, have developed a computer algorithm that runs on the network and rapidly, within 10-22 seconds, identifies when a DDoS is initiated based on the new, unexpected pattern of data triggered by the attack. The false positive rate is very low and it allows the system to trace the illicit activity back to the main nodes from which it is originating and to deny them access to the network, so thwarting the attack very quickly.
The researchers say that their technique can halt 80% of the DDoS attack traffic and so allow users to continue using their devices almost as normal and to block the window of opportunity through malware might be implanted during such an attack. More importantly, from a computer science point of view is that the study provides a model framework on which better security systems might be built for MANETs and other networks.
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