Weakness and Improvement of an Efficient Key Agreement Protocol
Shuang Qing Liu, Liang Xia, Meng Zi Zhang, Bao Ling Xie · Applied Mechanics and Materials · 2014
Xiao and Li proposed protocol XKAS and claimed it to be an efficient and secure two-party authenticated Diffie-Hellman key agreement protocol. In this letter, we show that the protocol is vulne- rable to a key-compromise impersonation attack. We also proposed XKAS+, which can withstand such attacks. The new protocol enjoys this property at the expense of a slight increase in computational workload with respect to the original version.