Recently, Due to the rapid development of the internet and IT technology, users can conveniently use various services provided by the server anytime and anywhere. However, these technologies are exposed to various security threat such as tampering, eavesdropping, and exposing of user’s identity and location information. In 2016, Nikooghadam et al. proposed a lightweight authentication and key agreement protocol preserving user anonymity. This paper overcomes the vulnerability of Nikooghadam’s authentication protocol proposed recently. This paper suggests an enhanced remote user authentication protocol that protects user’s password and provides perfect forward secrecy.
Recently, Due to the rapid development of the internet and IT technology, users can conveniently use various services provided by the server anytime and anywhere. However, these technologies are exposed to various security threat such as tampering, eavesdropping, and exposing of user’s identity and location information. In 2016, Nikooghadam et al. proposed a lightweight authentication and key agreement protocol preserving user anonymity. This paper overcomes the vulnerability of Nikooghadam’s authentication protocol proposed recently. This paper suggests an enhanced remote user authentication protocol that protects user’s password and provides perfect forward secrecy.
Recently, Due to the rapid development of the internet and IT technology, users can conveniently use various services provided by the server anytime and anywhere. However, these technologies are exposed to various security threat such as tampering, eavesdropping, and exposing of user's identity and location information. In 2016, Nikooghadam et al. proposed a lightweight authentication and key agreement protocol preserving user anonymity. This paper overcomes the vulnerability of Nikooghadam's authentication protocol proposed recently. This paper suggests an enhanced remote user authentication protocol that protects user's password and provides perfect forward secrecy.
Remote user authentication is an essential part in electronic commerce to identify legitimate users over the Internet. However, how to protect user privacy in the authentication has become an important issue recently. Therefore, many secure authentication schemes with smart cards have been proposed. In this paper, we will analyze the security weaknesses of two recently proposed authentication schemes for preserving user privacy. First, Chang et al. (2011) proposed a robust and efficient remote user authentication scheme to provide user anonymity. However, this scheme fails to protect user privacy in terms of anonymity and traceability. In addition, it is vulnerable to the server counterfeit attack and it does not provide perfect forward secrecy for session keys. Furthermore, if the smart card is lost, it will suffer from the offline password guessing attack as well as the user impersonation attack. Second, Wen and Li (2012) recently presented an improved dynamic ID-based authentication scheme with key agreement. However, this scheme is vulnerable to traceability. In addition, it does not support perfect forward secrecy for session keys. Furthermore, the insecure offline password change phase and online secret renewal phase will result in the denial of service attack.
Password based authentication schemes have been widely used to verify the legitimacy of a user over an insecure communication channel. A common feature among most of the published schemes is that user's identity (ID) is static in all the transaction sessions, which may leak some information about the user and can create risk of identity theft during message transaction. Therefore, to provide user anonymity, many dynamic ID based remote users authentication schemes have been proposed. Recently, Khan et al. proposed an efficient and secure dynamic ID based remote user authentication scheme and claimed that their scheme can provide strong security against various attacks. In this paper, we have demonstrated that Khan et al.'s scheme is vulnerable to server spoofing attack and insider attack, and has some flaws in login and authentication phase as well and also proposed an enhanced scheme to overcome the identified weaknesses.
Rapid growth of mobile and networking technologies, resulted in new paradigms of networking like Internet of Things (IoT) etc, which allows user to connect to insecure public communication channel through various devices and can access the services and data provided by remote server. Thus, remote user authentication and key agreement for wireless, wired, IoT communications becoming more challenging task. In this context many researchers have proposed authentication schemes. In 2013, An et al. proposed a dynamic ID-based remote user authentication scheme which is secure, even if the secret values stored in the smart card is revealed. In 2014, Troung et al claimed that An et al scheme is vulnerable to server forgery attack and proposed an improved scheme. In this manuscript, we validate that Troung et al's scheme is vulnerable to known session specific temporary information attack, replay and impersonation attack. Furthermore, we also propose the improved scheme to overcome these limitations without increase in the cost front.
In recent years, the Internet of things (IoT) has become an encouraging communication paradigm that has numerous applications including smart city, smart home and intelligent transportation system. The information sensed by several IoT smart devices can be security stored at the (cloud) servers. An external user, being a client, can access the services from a server for the sensing information, provided that a mutual authentication happens among them. Using the established session key among the user and the server, encrypted information with the help of session key can be delivered to the user by the server securely. Recently, Rana et al. proposed a smart-card based remote user authentication scheme using user password. In this comment paper, we carefully analyzed the scheme of Rana et al. and tracked down that their scheme is insecure against serious attacks, including stolen smart card attack, privileged-insider attack, user impersonation attack, password change attack and Ephemeral Secret Leakage (ESL) attack. Furthermore, their scheme does not preserve untraceability feature. To remedy these security pitfalls, we also provide some remedies that can help in building more secure and effective user authentication scheme to apply in securing next generation IoT infrastructure.