Comment on "A remote user authentication scheme using smart cards with forward secrecy

In 2000, Hwang and Li proposed a new remote user authentication scheme using smart cards. However. Chan and Cheng showed that the scheme is vulnerable to the impersonation attack. Later, Shen et al. showed a different type of impersonation attack on the scheme and presented a modified scheme to withstand these attacks. Recently, Awasthi and LaI presented a remote user authentication scheme using smart cards with forward secrecy. In this paper, we show that the Awasthi and LaI´s scheme is incorrect.