OASIcs.Tokenomics.2020.12.pdf
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Blockguard: Adaptive Blockchain Security (Short Paper)
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Gokarna Sharma 
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2nd International Conference on Blockchain Economics, Security and Protocols (Tokenomics 2020)
Series: Open Access Series in Informatics (OASIcs)
Conference: International Conference on Blockchain Economics, Security and Protocols (Tokenomics) - License:
Creative Commons Attribution 3.0 Unported license
- Publication Date: 2021-02-02
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Shishir Rai, Kendric Hood, Mikhail Nesterenko, and Gokarna Sharma. Blockguard: Adaptive Blockchain Security (Short Paper). In 2nd International Conference on Blockchain Economics, Security and Protocols (Tokenomics 2020). Open Access Series in Informatics (OASIcs), Volume 82, pp. 12:1-12:5, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2021)
https://doi.org/10.4230/OASIcs.Tokenomics.2020.12
Abstract
We change the security of blockchain transactions by varying the size of consensus committees. To improve performance, such committees operate concurrently. We present two algorithms that allow adaptive security by forming concurrent variable size consensus committees on demand. One is based on a single joint blockchain, the other is based on separate sharded blockchains. For in-committee consensus, we implement synchronous Byzantine fault tolerance algorithm (BFT), asynchronous BFT and proof-of-work consensus. We evaluate the performance of our adaptive security algorithms.
Subject Classification
ACM Subject Classification
- Theory of computation → Distributed algorithms
- Computing methodologies → Distributed algorithms
- Networks → Security protocols
- Security and privacy → Distributed systems security
Keywords
- Blockchain
- Consensus
- Security
- Distributed algorithms
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References
- Ittai Abraham, Srinivas Devadas, Kartik Nayak, and Ling Ren. Brief announcement: Practical synchronous byzantine consensus. In DISC, pages 41:1-41:4, 2017. URL: https://doi.org/10.4230/LIPIcs.DISC.2017.41.
- Miguel Castro and Barbara Liskov. Practical byzantine fault tolerance and proactive recovery. ACM Trans. Comput. Syst., 20(4):398-461, November 2002. URL: https://doi.org/10.1145/571637.571640.
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Satoshi Nakamoto. Bitcoin: A peer-to-peer electronic cash system,” http://bitcoin.org/bitcoin.pdf, 2008.
