A security enhanced password authentication and update scheme based on elliptic curve cryptography. - Pengshuai Qiao; Hang Tu (Int. J. Electron. Secur. Digit. Forensics, 2014)

A security enhanced user authentication scheme for multi-server environment without using smart cards. - Pengshuai Qiao (Int. J. Electron. Secur. Digit. Forensics, 2015)