Abstract
In this paper we have proposed an efficient password security of Three-Party Key Exchange Protocol based on Elliptic Curve Discrete Logarithm Problem. Key exchange protocols allow two parties communicating over a public network to establish a common secret key called session key. Due to their significance by in building a secure communication channel, a number of key exchange protocols have been suggested over the years for a variety of settings. Here we have taken two one-way hash functions to build the level of security high.