Dynamic router selection and encryption for data secure in Wireless Sensor Networks

In Wireless Sensor Network compromised node and denial of service are two key attacks. In this thesis the data delivery mechanisms that can with high probability circumvent black holes formed by these attacks. The classic multipath routing approaches are vulnerable to such attacks, mainly due to their deterministic nature. So once the adversary acquires the routing algorithm, it can compute the same routes known to the source, hence, making all information sent over these routes vulnerable to its attacks. A mechanism is developed that generate randomized multipath routes. Under this designs, the routes taken by the “shares” of different packets change over time. Each and every packet gets encrypted before sends and decrypted after receiving all the packets. So even if the routing algorithm becomes known to the adversary, the adversary still cannot pinpoint the routes traversed by each packet. Besides randomness, the generated routes are also highly dispersive and energy efficient, making them quite capable of circumventing black holes.