An Efficient Password Security of Key Exchange Protocol based on ECDLP

In this paper we have proposed an efficient password security of Three-Party and Multiparty Key Exchange Protocol based on Elliptic Curve Discrete Logarithm Problem. In three party Key exchange protocols allow two clients with a trusted Server where they registered their password and communicate over a public network to establish a common secret key called session key. Similary multiparty key exchange protocol allow a group of parties communicating over a public network to establish the 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 built the level of security high