In-house USNs (Ubiquitous Sensor Network) can produce critical pieces of an accident-notification chain, thus they must be protected from failure. Denial of service attacks against such networks may permit fatal damage to the health and safety of people. Traditional intrusion detection schemes cannot work for USN due to its peculiar characteristics for instance, limited energy and computation resources. In this paper we propose a detection and traceback mechanism for jamming and selective forwarding attacks on USN by observing MAC layer abnormalities. The proposed scheme is light weight and requires minimum computation to detect a DDoS attack on miniature sensor nodes.
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