On the security of a three factor remote user authentication scheme using fuzzy extractor

Abstract

A secure authenticated key exchange protocol is an important key to establish a secure wireless communication. Various research have been conducted to study the efficiency and security of these authenticated key exchange protocol. A recent work by Giri et al. proposed a three factor remote user authentication scheme using Fuzzy Extractor for single server environment. However we found that their protocol is still vulnerable against an online password guessing attack. We also found that their protocol does not provide the perfect forward secrecy. To solve such problems, we propose a simple but effective improvement.