Light Weight Secure Key Generation Protocol with Hidden Generator Point using ECC

Key generation and distribution is one of the most important primitive of any security framework. This is irrespective of using a symmetric or asymmetric cryptosystem. However, while securing a WSN, its resource constraint nature cannot be ignored. Therefore Elliptical Curve Cryptography (ECC) based solutions like Elliptical Curve Digital Signature algorithm (ECDSA), Elliptical Curve Diffie-Hellman (ECDH) are becoming more and more popular in comparison to other Public crypto system like RSA. In ECC, the Generator point is treated as a public parameter along with other domain parameters. This can make communication within the WSN vulnerable to man-in-the-middle attack. The attack can be thwarted by keeping the Generator point Private and still be able to establish a common Generator Point across communication parties .It will result in establishing a light weight secure key between a sender and a receiver and achieve other security primitives like generation of MAC and Node identification. This paper discusses and analyses the generation of Shared keys using 1 hidden generator point in comparison to 2- hidden point generator and the conventional ECDH method.