Minotaur: Multi-Resource Blockchain Consensus
Matthias Fitzi, Xuechao Wang, Sreeram Kannan, Aggelos Kiayias, and Nikos Leonardos, Pramod Viswanath, Gerui Wang

TL;DR
Minotaur introduces a multi-resource blockchain consensus protocol combining proof-of-work and proof-of-stake, ensuring security through optimal fungibility and robustness against resource fluctuations and attacks.
Contribution
It presents the first provably fungible multi-resource consensus protocol combining PoW and PoS, with a practical implementation and empirical validation.
Findings
Handles higher work fluctuation than Bitcoin
Proven to be optimally fungible between resources
Demonstrated robustness through empirical testing
Abstract
Resource-based consensus is the backbone of permissionless distributed ledger systems. The security of such protocols relies fundamentally on the level of resources actively engaged in the system. The variety of different resources (and related proof protocols, some times referred to as PoX in the literature) raises the fundamental question whether it is possible to utilize many of them in tandem and build multi-resource consensus protocols. The challenge in combining different resources is to achieve fungibility between them, in the sense that security would hold as long as the cumulative adversarial power across all resources is bounded. In this work, we put forth Minotaur, a multi-resource blockchain consensus protocol that combines proof-of-work (PoW) and proof-of-stake (PoS), and we prove it optimally fungible. At the core of our design, Minotaur operates in epochs while…
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Taxonomy
TopicsBlockchain Technology Applications and Security
