Weaknesses of a Remote User Authentication Scheme Using Smart Cards for Multi-Server Architecture
Wei‐Chi Ku · IEICE Transactions on Communications · 2005
Recently, Lin, Hwang, and Li proposed an efficient remote authentication scheme using smart cards for multi-server architecture based on the geometric property of the Euclidean plane. Herein, we show that their scheme is vulnerable to two forgery attacks and a password-guessing attack, and is not easily repairable. Furthermore, their scheme lacks a proper user eviction mechanism.