Distributed Trust based Intrusion Detection approach in wireless sensor network

Security of wireless sensor network is always a major thing as it has widespread application in most of the major domains such as battlefield surveillance, healthcare, etc. Basically there are three main components that deal with security of wireless sensor network, prevention, detection and mitigation. But it is very difficult to prevent wireless sensor network always from malicious attacks so it is always important to detect them as early as possible so that we can react to the attack not harm to wireless sensor network., This paper proposes Distributed Trust based Intrusion Detection (DTBID) approach which considers several factors for establishing trust of sensor node. Most of the research work only considers the communication behavior to derive the trust. Our intrusion detection system will consider trust which is distributed among some other factors such as energy, reliability, data etc. We derive and formulate trust such as direct trust, recommendation trust, and indirect trust from these factors. We provide an approach to decide whether particular node is malicious node or not by comparing subjective trust derived from our intrusion detection technique to that of objective trust which is calculated based on the actual information of each node without considering any network dynamics such as node mobility, trust decay over time, and any malicious attacks. If there is a lot of difference between subjective trust derived from our model to that of objective trust then we consider sensor node as malicious node.