Security Flaw of an Improved User Authentication Scheme with User Anonymity for Wireless Communications
Hu Xiong, Xiaofeng Wang, Fagen Li · IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences · 2012
Recently, Kang et al. discussed some security flaws of Wu et al.'s and Wei et al.'s authentication schemes that guarantee user anonymity in wireless communications and showed how to overcome the problems regarding anonymity and the forged login messages. However, we will show that Kang et al.'s improved scheme still did not provide user anonymity as they claimed.