Browsing by Author "Madhusudhan R."

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An Efficient Two Factor Authentication Scheme Providing Secure Communication in Mobile Cloud Computing
(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.
An improved user authentication scheme for electronic medical record systems
(2020) Madhusudhan R.; Nayak C.S.
Electronic Medical Record (EMR) systems is a part of e-healthcare system, which is developing rapidly. In this, it is possible to deliver medical services among multiple participants over a network without physical presence. Since sensitive data is transmitted over public channels, it is very much required to maintain the secrecy of that data. This is achieved by mutual authentication between the participants. For this, various schemes for authentication with smart cards have been proposed. Han et al. proposed one such biometrics-based scheme for the same purpose using hash functions along with symmetric key encryption and elliptic curve cryptography. From cryptanalysis of their scheme, we have pointed out weaknesses viz. no user anonymity, user and server impersonation, man-in-the-middle attack. These security issues have been presented in this article. To overcome these attacks, a scheme has been proposed in this article. Since it does not use symmetric key encryption, the proposed scheme reduces the computational complexity as can be seen in the comparison provided. The security analysis of the proposed scheme, along with BAN (Burrows-Abadi-Needham) logic has been explained in detail. Comparison of the proposed scheme with related schemes with respect to computation cost, execution time and performance is demonstrated. This proves that the proposed scheme performs well in terms of security as well as computational efficiency. © 2020, Springer Science+Business Media, LLC, part of Springer Nature.
Robust and secure authentication protocol protecting privacy for roaming mobile user in global mobility networks
(2021) Madhusudhan R.; Suvidha K.S.
With the advent of new 5G technology there is a need to develop security architecture. Two factor authentication schemes are developed to address the security features such as user anonymity and privacy preservation during roaming scenario in GLObal Mobility NETwork. The entire communication during roaming is carried over insecure channel and owing to this, security concern is raised. The main objective of the proposed protocol is to secure the channel and to overcome all active and passive security attacks. The proposed protocol addresses the active and passive security attacks that exist in 5G cellular networks which are formally verified using AVISPA tool. The proposed protocol is simulated using NS2.35 simulator and the performance metrics such as throughput, end to end delivery and packet delivery ratio are computed. The protocol is efficient in terms of computational and communication cost. The proposed scheme is robust and practically implementable. © 2021 Inderscience Enterprises Ltd.
A Secure and Lightweight Authentication Protocol for Mobile User Preserving Privacy in Global Mobility Networks
(2020) Madhusudhan R.; Suvidha K.S.
In two factor authentication schemes the key factor that has to be addressed is user anonymity and privacy preservation during roaming scenario in GLObal MObility NETwork. While roaming MU needs to access the services of the FA, FA grants the service request only to the authenticated MU. To verify the authenticity of the MU, FA sends the service request of MU to HA. HA verifies the authenticity of the MU after which FA allows the MU to access the services. The entire communication during roaming is carried over insecure channel. Due to this, several security concerns are raised. The main objective in GLOMONET is to secure the channel and the designed scheme should over come all active and passive security attacks. Since, the scheme is designed for mobile networks, it should be light weight with less communication cost, one such scheme has been proposed in this article. The proposed scheme is light weight with less communication cost. Additionally the proposed scheme addresses the active and passive security attacks. The scheme is efficient in terms of computational and communication cost. The proposed scheme is robust and practically implementable. © 2020 The Authors. Published by Elsevier B.V.