Security issues in Wireless Sensor Networks: Current research and challenges

“Wireless Sensor Networks (WSNs) are currently using in various application areas like as military, health care, ecological, medical, process management, environmental, industrial, agriculture etc. In this article we discussed about the security issues in WSNs. First of all we constraints on the obstacles in WSNs, requirement for security and different attacks at various levels with their solutions in WSNs. In the WSNs the security issues manage by these categories: cryptography techniques, a key management schemes, secure routing protocols, secure data aggregation and intrusion detection. Along with this we also compare the various routing protocols and security mechanism at high level and low level management in WSNs”. At last we also discussed the open research issues and challenges in WSNs.