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    A novel DNA based password authentication system for global roaming in resource-limited mobile environments
    (Springer, 2020) Madhusudhan, R.; Shashidhara R
    Mobile environments are highly vulnerable to security threats and pose a great challenge for the wireless and mobile networks being used today. Because the mode of a wireless channel is open, these networks do not carry any inherent security and hence are more prone to attacks. Therefore, designing a secure and robust protocol for authentication in a global mobile network is always a challenging. In these networks, it is crucial to provide authentication to establish a secure communication between the Mobile User (MU), Foreign Agent (FA) and Home Agent (HA). In order to secure communication among these entities, a number of authentication protocols have been proposed. The main security flaw of the existing authentication protocols is that attackers have the ability to impersonate a legal user at any time. Moreover, the existing authentication protocols in the literature are exposed to various kind of cryptographic attacks. Besides, the authentication protocols require larger key length and more computation overhead. To remedy these weaknesses in mobility networks, DNA (Deoxyribo Nucleic Acid) based authentication scheme using Hyper Elliptic Curve Cryptosystem (HECC) is introduced. It offers greater security and allows an MU, FA and HA to establish a secure communication channel, in order to exchange the sensitive information over the radio link. The proposed system derive benefit from HECC, which is smaller in terms of key size, more computational efficiency. In addition, the security strength of this authentication system is validated through widely accepted security verification tool called ProVerif. Further, the performance analysis shows that the DNA based authentication system using HECC is secure and practically implementable in the resource-constrained mobility nodes. © 2019, Springer Science+Business Media, LLC, part of Springer Nature.
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    Private and Consortium Blockchain-based Authentication Protocol for IoT Devices Using PUF
    (Korean Institute of Communications and Information Sciences, 2024) Cunha, T.B.D.; Manjappa, K.
    In this work, a static random access memory-physical unclonable function (SRAM-PUF) based device security framework is proposed which uses the trending blockchain technology for securing the device credentials. The proposed framework produces a unique fingerprint called PUF key for each device based on its hardware characteristics which will act as an authenticating parameter for the devices during the authentication and re-authentication phase. The proposed work uses both consortium and private blockchains for storing device credentials and authentication, unlike the current trend of using either a secured database or only a public blockchain. The consortium blockchain is used for first-time authentication, while the private blockchain is used for repeated authentication which saves the time incurred in accessing the consortium blockchain during repeated authentication. The proposed protocol also includes mutual authentication between the entities involved and thus provides dual security (device authentication and mutual authentication) to the proposed protocol making the system more secure and robust against attacks. Security analysis of the proposed protocol is done using the Scyther tool and the protocol is also theoretically proven to be stable under various attacks using threat analysis and the real-or-random model (ROR). The performance analysis of the protocol is done by analyzing the computation and communication cost of the proposed protocol against other state-of-the-art protocols. Further, the proposed protocol is also evaluated in the blockchain testbed which includes Raspberry PI and Arduino components. The results conveyed that the introduction of a private blockchain reduces the time incurred in the device re-authentication. © 2024 KICS.