Wireless Sensor Network (WSN) is a famous area of researchers. WSN is having wide scope and it is used in many sensitive applications like military, medical, biography etc. as it is used for prior data sharing so security is important issue in WSN. There are lots evolution has been done for achieving security in WSN. But while preserving security they are losing their attention from integrity factor of WSN. Everyone is solving security issues and ignoring scalability of network. If network is more scalable then implementation of secureness is complex factor.