Since the number of server providing the facilities for the user is usually more than one, the
authentication protocols for multi-server environment are required for practical applications …

Recently, Liao and Wang proposed a secure dynamic ID based remote user authentication
scheme for multi-server environment, and claimed that their scheme was intended to provide …

Traditional password based authentication schemes are mostly considered in single-server
environments. They are unfit for the multi-server environments from two aspects. Recently …

Revealing the security flaws of existing cryptographic protocols is the key to understanding
how to achieve better security. Dozens of multi-factor authentication schemes for multi …

Abstract Recently Ying and Nayak proposed a multi-server supported lightweight
authentication protocol for 5G networks and confirmed the security of their protocol against …

This study proposes a three‐factor control protocol for universal serial bus (USB) on an
elliptic curve cryptosystem (ECC). USB is a universal interface used in an enormous number …

An authentication scheme handling multiple servers offers a feasible environment to users to
conveniently access the rightful services from various servers using one-time registration …

Remote user authentication is used to validate the legitimacy of a remote log-in user. Due to
the rapid growth of computer networks, many network environments have been becoming …

The widespread popularity of the computer networks has triggered concerns about
information security. Password-based user authentication with key agreement protocols …

Two user authentication schemes for multi-server environments have been proposed by
Tsai and Wang et al., respectively. However, there are some flaws existing in both schemes …