Blockguard: Adaptive Blockchain Security (Short Paper)

Authors Shishir Rai, Kendric Hood, Mikhail Nesterenko, Gokarna Sharma

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Author Details

Shishir Rai
  • Kent State University, OH, USA
Kendric Hood
  • Kent State University, OH, USA
Mikhail Nesterenko
  • Kent State University, OH, USA
Gokarna Sharma
  • Kent State University, OH, USA

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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)


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
  • Blockchain
  • Consensus
  • Security
  • Distributed algorithms


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  3. Satoshi Nakamoto. Bitcoin: A peer-to-peer electronic cash system,”, 2008. Google Scholar
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