Conference Papers
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Item CollabChain: Blockchain-backed trustless web-based volunteer computing platform(Springer Verlag service@springer.de, 2019) Sagar Bharadwaj, K.S.; Dharanikota, S.; Honawad, A.; Chandrasekaran, K.Volunteer computing is a distributed computing model in which individuals in possession of computing resources volunteer to provide them to a project. Owing to the availability of billions of computing devices all over the world, volunteer computing can help solve problems that are larger in scale even for supercomputers. However, volunteer computing projects are difficult to launch and deploy. These platforms also force volunteers to trust the authenticity of the project owner and to blindly accept credits allotted to their contribution by the project owner. As a result, very few high-profile trusted projects are able to sustain in this system. In this paper, we present an incentivized web-based volunteer computing platform that functions as a market place to buy and sell computing power. Launching a project on the system and contributing to an existing project happens over the browser without the need for a specialized software or hardware. We introduce the application of blockchain to remove the need to trust any other party in the system. We also present a prototype implementation and solve NP-Problems as examples using the proposed prototype. © 2019, Springer Nature Switzerland AG.Item VoteChain: A Blockchain Based E-Voting System(Institute of Electrical and Electronics Engineers Inc., 2019) Pandey, A.; Bhasi, M.; Chandrasekaran, K.In the past, electronic voting systems have not seen widespread adoption due to data privacy concerns. Previously proposed e-voting systems make use of a central database to store data, resulting in the servers used to store these databases being a single point of failure. These systems have also been found to be vulnerable to DoS attacks, leading to concerns over their reliability.Blockchains have been used to build secure and scalable distributed systems which have shown several benefits over centralized systems. They have seen uses in sectors ranging from finance and healthcare to food and energy.In this paper, we present VoteChain, a blockchain based voting system to help bring transparency and security to polls. We report on our implementation of VoteChain, as well as the results obtained in testing the system in a real-world poll which prove that such a system can be used in practice for large-scale elections. © 2019 IEEE.Item Towards a Secure Electronic Health Record System using Blockchain Technology(Institute of Electrical and Electronics Engineers Inc., 2021) Bhattacharyya, S.; Chandrasekaran, K.Blockchain has emerged as a key technology for ensuring reliability and security in several application areas primarily including the healthcare sector. Blockchain is a distributed ledger where blocks of transactions are connected in a chain using the cryptographic hash function of the previous block, making it an append-only structure. Any modification on any of the blocks will generate different hash values in other blocks in a cascading manner and different link relations. In this way the blockchain achieves immutability and security. Blockchain also involves consensus mechanisms in order to ensure synchronization among blocks and agreement between existing nodes to add a new transaction in the chain. Healthcare data is highly sensitive in nature, which consists of private information related to the diagnosis and treatment of patients. In traditional approach these data are stored by each hospital separately where sharing data is very time consuming. Also, health data is very limited to access due to the risk of disclosure of sensitive information. In order to address these issues, the objective of this paper is to integrate blockchain technology with healthcare records/data in order to provide better sharing of data without the fear of data tampering or security breach. © 2021 IEEE.Item Distributed Data Management Ecosystem for Intelligent Transportation Systems using Blockchain Technology(Institute of Electrical and Electronics Engineers Inc., 2021) Srinath, A.; Chandrasekaran, K.Blockchain systems are known for their trustless multi-party transaction systems. Possessing properties such as immutability, transparency, data consistency and consensus based updation, blockchain has become a very important decentralized tool for applications that are time sensitive and require security. The purpose of this paper is to explore how we can apply blockchain technology solutions to Intelligent transportation systems(ITS) with a data management perspective. We propose an ecosystem architecture for such ITS applications and dive deep into distributed data management concepts involved in each layer of the architecture. We examine the flow of data in blockchain based ITS applications of the proposed architecture. Finally we have also provided a use-case scenario. © 2021 IEEE.Item Machine Learning Powered Autoscaling for Blockchain-Based Fog Environments(Springer Science and Business Media Deutschland GmbH, 2022) Martin, J.P.; Joseph, C.T.; Chandrasekaran, K.; Kandasamy, A.Internet-of-Things devices generate huge amount of data which further need to be processed. Fog computing provides a decentralized infrastructure for processing these huge volumes of data. Fog computing environments provide low latency and location-aware alternative to conventional cloud computing by placing the processing nodes closer to the end devices. Co-ordination among end devices can become cumbersome and complex with the increasing amount of IoT devices. Some of the major challenges faced while executing services in the fog environment is the resource provisioning for the user services, service placement among the fog devices and scaling of fog devices based on the current load on the network. Being a decentralized infrastructure, fog computing is vulnerable to external threats such as data thefts. This work presents a blockchain based fog framework for making autoscaling decisions with the use of machine learning techniques. Evaluation is done by performing a series of experiments that show how the services are handled by the fog framework and how the autoscaling decisions are made. © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.Item Fully Decentralized Blockchain and Browser-Based Volunteer Computing Platform(Springer Science and Business Media Deutschland GmbH, 2022) Bharadwaj, K.S.S.; Dharanikota, S.; Honawad, A.; Divakarla, D.; Chandrasekaran, K.Volunteer computing allows individuals, who have access to computing resources that are currently idle, to allocate them to perform useful work. This paradigm has existed since a long time and is evolving by the day with the advent of novel approaches such as browser-based volunteer computing. But most of these solutions have a degree of centralization in their architecture and are prone to single point of failure issues, or require explicit trust in the entities that manage the network. This paper proposes the use of blockchain to eliminate these drawbacks of traditional volunteer computing platforms, at the same time preserving the ability to make the architecture entirely browser-based. The key focus of our proposal is on resilience. Resilience is achieved by making use of the decentralized storage system, InterPlanetary File System. Finally, we present a prototype implementation of our ideas. We evaluate our system by solving NP-problems using the prototype. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.Item Automation with Blockchain: Creating a Marketplace for IoT Based Irrigation System(Springer Science and Business Media Deutschland GmbH, 2023) Divakarla, U.; Chandrasekaran, K.The next revolutionary technology to emerge since the creation of bitcoin in 2008 is blockchain technology. The Internet of Things (IoT), security, and other industries have all adopted blockchain technology. The article discusses the use of smart contracts, an Ethereum blockchain feature, to automate transactions in the Ethereum blockchain-based marketplace platform for Internet of Things devices. The following is demonstrated as a proof of concept by building a prototype of the suggested platform utilising Ethereum, Ganache, Web3, and Metamask. This exemplifies how transactions can be automated using smart contracts on the blockchain. When the land’s moisture content is less than some critical value, the prototype concentrates on automating the watering of the land. Real-time monitoring of the moisture level of the consumer’s land is possible. On the basis of the centralised paradigm, attempts are being made to construct such a system. The goal is to automate every activity. In the blockchain, the smart contract functions like a living thing. Because of this, automating is made possible. The blockchain also gives each gadget a unique account, considering them as participants in the transaction rather than just the sold goods, increasing the potential for automation. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.