Survey of Prevention Techniques for Denial Service Attacks (DoS) in Wireless Sensor Network

Wireless sensors are very small embedded devices with low memory, low computing power and low battery life. Various applications such as continuous connectivity, weather monitoring, industry and instantly -deployable communication for first responders and armed. These networks already consider environmental conditions, factory performance, and troop deployment, to name some applications. Wireless ad-hoc sensor network is gaining popularity in all organization and it is basic means for communication. Wireless ad-hoc sensor network is defenseless to Denial of Service (DOS) attack. DOS attack create the network resources is absent to users. In DOS attack it creates the node to consume more battery power and reduces the network performance. Different techniques are used for detection and avoidance of DOS attack such as packet leash, lightweight Secure Mechanism, spread spectrum and energy weight monitoring scheme (EMWA) but DOS attack cannot fully legitimate using this techniques. This paper survey of various types of DOS attacks and its Detection and Prevention methods.