Cryptanalysis of a remote user authentication scheme using smart cards
Chi-Kwong Chan, L.M. Cheng · IEEE Transactions on Consumer Electronics · 2000
We present a cryptanalysis of a remote user authentication scheme proposed by Hwang and Li (see ibid., vol.46, no.1, p.28-31, 2000). We show that Hwang-Li's scheme is breakable. A legitimate user can impersonate other legal users and pass the system authentication.