Secure Energy Efficient Routing in Wireless Sensor Network-A Survey on Existing Techniques

Wireless Sensor Network are special kind of Ad-hoc networks. There are number of application for wireless sensor networks like military, healthcare and civil areas and security is important for many of them. However WSN suffers from many constraints like low computation capability, small memory, limited energy resources, lack of infrastructure which impose security challenge. Traditional security mechanism is not suitable in WSN. Security in WSN is challenging task. This paper discuss need of security, security requirements, various type of attacks, we also discuss existing security techniques like cryptography, Steiner based security mechanism, Trust based security mechanism, a minimum hop routing techniques for home security and discuss some future direction for research. Keywords— Wireless Sensor Networks, energy efficient, security, security mechanisms.