Nt1310 Unit 1 Assignment 1

Words: 522
Pages: 3

2. PROBLEM STATEMENT
A Review on Security, Energy & Congestion based issues in multipath routing for Wireless Sensor Network. The Simplicity in Wireless Sensor Network with resource constrained nodes makes them extremely vulnerable to variety of attacks. In a Wireless sensor networks sensor nodes monitor the environment, detect events of interest, produce data and collaborate in forwarding the data towards to a sink, which could be a gateway, base station or storage node. Securing the Wireless Sensor Networks need to make the network support all security properties: confidentiality, integrity, authenticity and availability. A sensor network is often deployed in an unattended and hostile environment to perform the monitoring and data collection tasks. When it is deployed in such an environment, it lacks
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After compromising one or multiple sensor nodes, an adversary may launch various attacks to disrupt the in-network communication. Among these attacks, two common ones are dropping packets and modifying packets, i.e. compromised nodes drop or modify the packets that they are supposed to forward. We expect sensor networks to consist of hundreds or thousands of sensor nodes as in Figure1.

Each node represents a potential point of attack, making it impractical to monitor and protect each individual sensor from either physical or logical attack. The networks may be dispersed over a large area, further exposing them to attackers who capture and reprogram individual sensor nodes. Attackers can also obtain their own commodity sensor nodes and induce the network to accept them as legitimate nodes, or they can claim multiple identities for an altered node. Once in control of a few nodes inside the network, the adversary can then mount a variety of attacks. Packet dropping is nothing but a bad node drops all or some of the packets that are supposed to be forwarded. It may also drop the data generated by itself for some malicious purpose such as blaming