Conference Papers
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Item An efficient and secure user authentication scheme with anonymity in global mobility networks(Institute of Electrical and Electronics Engineers Inc., 2017) Madhusudhan, R.; Suvidha, K.S.User authentication is a very important security mechanism for accessing the services while roaming in the global mobility networks. However, the authentication schemes designed are vulnerable to the attacks, hence new requirements should be employed while designing a scheme. In 2014 Gope and Hwang proposed an efficient mutual authentication and key agreement scheme, in which they stated that the scheme provides a strong security to the user anonymity. In this paper we have proved that Gope and Hwang scheme is vulnerable to stolen smart card attack, offline password guessing attack, forgery attack and replay attack. Moreover their scheme fails to preserve user anonymity. Hence a new efficient and secure user authentication scheme with anonymity in global mobility networks is proposed. Furthermore, the security analysis of the proposed scheme is also presented in this paper. Performance analysis shows that the proposed scheme is secure and suitable for practical implementation. © 2017 IEEE.Item An enhanced secure authentication scheme with user anonymity in mobile cloud computing(Institute of Electrical and Electronics Engineers Inc., 2017) Madhusudhan, R.; Suvidha, K.S.With the rapid growth and development in cloud computing and mobility, mobile cloud computing has emerged and becomes the trend of future generation computing paradigm. Cloud offers infrastructure, platform and software services to mobile users through mobile network. The key issues in mobile cloud computing are security and privacy. While analysing security and privacy issues in mobile cloud computing, three aspects should be considered they are: mobile terminal, mobile network and the cloud. To address the key issues in mobile cloud computing, we proposed an authentication scheme which will provide security to the messages exchanged between mobile user and the cloud server. Lee at al. have proposed authentication scheme for roaming service in global mobility networks in 2016. In this paper we have reviewed Lee et al.'s scheme and proved that their scheme is vulnerable to replay attack, man in the middle attack and impersonation attack. Moreover their scheme fails to preserve user anonymity, provides no local password verification and could not achieve perfect forward secrecy. Hence an enhanced secure authentication scheme with user anonymity in mobile cloud computing is proposed. Furthermore, the security analysis of the proposed scheme is also presented in this paper. © 2017 IEEE.Item An Efficient Two Factor Authentication Scheme Providing Secure Communication in Mobile Cloud Computing(Institute of Electrical and Electronics Engineers Inc., 2019) Madhusudhan, R.; Suvidha, K.S.Integration of mobile networks with cloud computing platform led to development of mobile cloud computing. Since the communication between mobile devices and the cloud computing occur over wireless medium, securing the network becomes paramount. With the thorough literature survey, we found that many two factor authentication schemes proposed so far to preserve user anonymity are vulnerable to various security attacks, they also had shortcomes to achieve security goals. To overcome the issues related to the two factor authentication schemes in mobile cloud computing, a new scheme is proposed. Furthermore, we have simulated the proposed scheme using widely accepted AVISPA (Automated Validation of Internet Security Protocols and Applications) tool. With the simulated result of the proposed scheme, we show that the proposed scheme is secure against active and passive security attacks. Additionally, the proposed scheme is compared with Gope and Hwang's scheme and other related schemes in terms of computational cost and communication overhead. The proposed scheme is efficient, robust and suitable for practical implementation. © 2019 IEEE.