1. | Anurag Jain; Sanidhay Arora; Sankarshan Damle; Sujit Gujar: Tiramisu: Layering Consensus Protocols for Scalable and Secure Blockchains. IEEE International Conference on Blockchain and Cryptocurrency, Forthcoming. (Type: Conference | BibTeX | Tags: Blockchain, Scalable Blockchain) @conference{Anurag22a, title = {Tiramisu: Layering Consensus Protocols for Scalable and Secure Blockchains}, author = {Anurag Jain and Sanidhay Arora and Sankarshan Damle and Sujit Gujar }, year = {2022}, date = {2022-05-03}, booktitle = {IEEE International Conference on Blockchain and Cryptocurrency}, keywords = {Blockchain, Scalable Blockchain}, pubstate = {forthcoming}, tppubtype = {conference} } |
2. | Anurag Jain; Shoeb Siddiqui; Sujit Gujar: We might walk together, but I run faster: Network Fairness and Scalability in Blockchains. Proceedings of the 20th International Conference on Autonomous Agents and Multiagent Systems (AAMAS 2021), 2021. (Type: Conference | Abstract | BibTeX | Tags: Blockchains, Distributed Ledgers, fairness, Peer-to-Peer Networks, Scalability) @conference{Jain2021, title = {We might walk together, but I run faster: Network Fairness and Scalability in Blockchains}, author = {Anurag Jain and Shoeb Siddiqui and Sujit Gujar}, editor = {U. Endriss and A. Now\'{e} and F. Dignum and A. Lomuscio }, year = {2021}, date = {2021-05-05}, booktitle = {Proceedings of the 20th International Conference on Autonomous Agents and Multiagent Systems (AAMAS 2021)}, abstract = {Blockchain-based Distributed Ledgers (DLs) promise to transform the existing financial system by making it truly democratic. In the past decade, blockchain technology has seen many novel applications ranging from the banking industry to real estate. However, in order to be adopted universally, blockchain systems must be scalable to support a high volume of transactions. As we increase the throughput of the DL system, the underlying peer-to-peer network might face multiple levels of challenges to keep up with the requirements. Due to varying network capacities, the slower nodes would be at a relative disadvantage compared to the faster ones, which could negatively impact their revenue. In order to quantify their relative advantage or disadvantage, we introduce two measures of network fairness, p_f, the probability of frontrunning and alpha_f, the publishing fairness. We show that as we scale the blockchain, both these measures deteriorate, implying that the slower nodes face a disadvantage at higher throughputs. It results in the faster nodes getting more than their fair share of the reward while the slower nodes (slow in terms of network quality) get less. Thus, fairness and scalability in blockchain systems do not go hand in hand. In a setting with rational miners, lack of fairness causes miners to deviate from the ``longest chain rule'' or emph{undercut}, which would reduce the blockchain's resilience against byzantine adversaries. Hence, fairness is not only a desirable property for a blockchain system but also essential for the security of the blockchain and any scalable blockchain protocol proposed must ensure fairness.}, keywords = {Blockchains, Distributed Ledgers, fairness, Peer-to-Peer Networks, Scalability}, pubstate = {published}, tppubtype = {conference} } Blockchain-based Distributed Ledgers (DLs) promise to transform the existing financial system by making it truly democratic. In the past decade, blockchain technology has seen many novel applications ranging from the banking industry to real estate. However, in order to be adopted universally, blockchain systems must be scalable to support a high volume of transactions. As we increase the throughput of the DL system, the underlying peer-to-peer network might face multiple levels of challenges to keep up with the requirements. Due to varying network capacities, the slower nodes would be at a relative disadvantage compared to the faster ones, which could negatively impact their revenue. In order to quantify their relative advantage or disadvantage, we introduce two measures of network fairness, p_f, the probability of frontrunning and alpha_f, the publishing fairness. We show that as we scale the blockchain, both these measures deteriorate, implying that the slower nodes face a disadvantage at higher throughputs. It results in the faster nodes getting more than their fair share of the reward while the slower nodes (slow in terms of network quality) get less. Thus, fairness and scalability in blockchain systems do not go hand in hand. In a setting with rational miners, lack of fairness causes miners to deviate from the ``longest chain rule'' or emph{undercut}, which would reduce the blockchain's resilience against byzantine adversaries. Hence, fairness is not only a desirable property for a blockchain system but also essential for the security of the blockchain and any scalable blockchain protocol proposed must ensure fairness. |
3. | Dimitris Chatzopoulos; Anurag Jain; Sujit Gujar; Boi Faltings; Pan Hui: Towards Mobile Distributed Ledgers. In: IEEE Internet of Things Journal, 2021. (Type: Journal Article | BibTeX | Tags: ) @article{chatzopoulos2021mobile, title = {Towards Mobile Distributed Ledgers}, author = {Dimitris Chatzopoulos and Anurag Jain and Sujit Gujar and Boi Faltings and Pan Hui}, year = {2021}, date = {2021-01-01}, journal = {IEEE Internet of Things Journal}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
4. | Sanidhay Arora; Anurag Jain; Sankarshan Damle; Sujit Gujar: ASHWAChain: A Fast, Scalable and Strategy-proof Committee-based Blockchain Protocol. Workshop on Game Theory in Blockchain at WINE 2020 (GTiB@WINE 2020), 2020. (Type: Workshop | BibTeX | Tags: Blockchain, Blockchain Consensus Protocols, Game Theory, Scalable Blockchain) @workshop{Arora2020, title = {ASHWAChain: A Fast, Scalable and Strategy-proof Committee-based Blockchain Protocol}, author = {Sanidhay Arora and Anurag Jain and Sankarshan Damle and Sujit Gujar}, editor = {Jing Chen and Xiaotie Deng}, year = {2020}, date = {2020-12-11}, booktitle = {Workshop on Game Theory in Blockchain at WINE 2020 (GTiB@WINE 2020)}, keywords = {Blockchain, Blockchain Consensus Protocols, Game Theory, Scalable Blockchain}, pubstate = {published}, tppubtype = {workshop} } |
5. | Anurag Jain; Sujit Gujar: Block Rewards, Not Transaction Fees Keep Miners Faithful In Blockchain Protocols. Workshop on Game Theory in Blockchain at WINE 2020 (GTiB@WINE 2020), 2020. (Type: Workshop | BibTeX | Tags: Block Rewards, Blockchains, Distributed Ledgers, Faithful Implementation, Game Theory) @workshop{Jain2020, title = {Block Rewards, Not Transaction Fees Keep Miners Faithful In Blockchain Protocols}, author = {Anurag Jain and Sujit Gujar }, editor = {Jing Chen and Xiaotie Deng}, year = {2020}, date = {2020-12-11}, booktitle = {Workshop on Game Theory in Blockchain at WINE 2020 (GTiB@WINE 2020)}, keywords = {Block Rewards, Blockchains, Distributed Ledgers, Faithful Implementation, Game Theory}, pubstate = {published}, tppubtype = {workshop} } |
1. | Tiramisu: Layering Consensus Protocols for Scalable and Secure Blockchains. IEEE International Conference on Blockchain and Cryptocurrency, Forthcoming. | :
2. | We might walk together, but I run faster: Network Fairness and Scalability in Blockchains. Proceedings of the 20th International Conference on Autonomous Agents and Multiagent Systems (AAMAS 2021), 2021. | :
3. | Towards Mobile Distributed Ledgers. In: IEEE Internet of Things Journal, 2021. | :
4. | ASHWAChain: A Fast, Scalable and Strategy-proof Committee-based Blockchain Protocol. Workshop on Game Theory in Blockchain at WINE 2020 (GTiB@WINE 2020), 2020. | :
5. | Block Rewards, Not Transaction Fees Keep Miners Faithful In Blockchain Protocols. Workshop on Game Theory in Blockchain at WINE 2020 (GTiB@WINE 2020), 2020. | :