Faculty Publications
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Item Design and modelling an attack on multiplexer based physical unclonable function(Seventh Sense Research Group, 2020) Venkata, A.M.; Jeeru, D.R.; Vittal, K.P.This paper deals with study of the physical unclonable functions and specifically the design of arbiter based PUF (APUF) and extends the work on different types of attacks on the PUF designs to break the security of the device, which includes advanced computational algorithms. Machine learning (ML) based attacks are successful in attacking existing designs. So in this, the resistance of the modified, proposed design of APUF is examined by modelling the attack based on the logistic regression a MLbased algorithm. The design is validated on Basys-3 Artix -7 FPGA board with a part number (xc7a35tcpg236-1). © 2020 Seventh Sense Research Group. All rights reserved.Item 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.Item Physical unclonable functions and QKD-based authentication scheme for IoT devices using blockchain(Elsevier B.V., 2024) Cunha, T.B.D.; Manjappa, M.; Ranjan, R.; Vasilakos, A.V.As the number of Internet of Things (IoT) devices is increasing exponentially, strong security measures are needed to guard against different types of cyberattacks. This research offers a novel IoT device authentication technique to mitigate these challenges by integrating three cutting-edge technologies namely blockchain technology, Quantum Key Distribution (QKD), and Physically Unclonable Functions (PUFs). By utilizing the distinctive qualities of PUFs for device identification and the unrivaled security of QKD for key exchange, the proposed approach seeks to address the significant security issues present in IoT environments. Adopting blockchain technology ensures transparency and verifiability of the authentication process across distributed IoT networks by adding an unchangeable, decentralized layer of trust. An examination of the computing and communication costs reveals that the proposed protocol is effective, necessitating low computational resources that are critical for IoT devices with limited resources. The protocol's resistance against a variety of attacks is demonstrated by formal proofs based on the Real-Or-Random (ROR) model and security evaluations using the Scyther tool, ensuring the integrity and secrecy of communications. Various threats are analyzed, and the protocol is proven to be secure and efficient from all forms of attacks. © 2024 Elsevier B.V.