This paper proposes a defense mechanism called Consensus-Level Restriction for Ethereum Classic that limits the number of sequential blocks from a single miner to reduce the feasibility of 51% attacks.
Abstract
Blockchain technology provides a decentralized and secure data-management system. However, PoW consensus remains vulnerable to the risk of 51% attacks, where a single miner or pool controls over half of the network and can manipulate blocks and execute double-spending. This paper proposes a defense mechanism called Consensus-Level Restriction (CLR) for Ethereum Classic. It limits the number of sequential blocks from a single miner to reduce the feasibility of 51% attacks. We evaluated the effectiveness of CLR by using BlockSim simulator. Results show that CLR reduces the success rate of 51% attacks while maintaining a decentralized structure. This work strengthens blockchain security without compromising PoW principles.
The 51% attack remains one of the significant security concern in Proof-of-Work (PoW) blockchains, where increasing hash-power concentration can create a malicious majority-control risk and enable adversarial chain reorganization. This paper proposes a two-layer defense that combines early hash-power monitoring with ch...
This survey reviews blockchain consensus from a security-oriented lens and links distributed-systems fundamentals to concrete attack vectors and defense mechanisms and outlines open problems including the post-quantum cryptographic transition, cross-shard security and atomicity in sharded consensus, and adaptive defens...
The improved consensus gave clarity on how to scale without compromising security or decentralization proves that the improved consensus gave clarity on how to scale without compromising security or decentralization.
Kolli Lalitha Kumari, P. Kumari· Sigma Journal of Engineering...· 0 citations
The results show that a permissioned blockchain may be considered as a reliable layer for ensuring integrity and accountability of the digital transactions provided that the key management and governance is treated as one of the core problems of engineering.
J. Moedjahedy· JINAV: Journal of Informatio...· 0 citations
Maintaining a decentralized system requires a collective governance mechanism that allows participants to agree on possible changes to the system. In particular, the governance mechanism should offer a voting functionality that allows for the casting, collection, and tallying of votes in a confidential yet verifiable m...
Raghav Bhaskar, P. Farshim, Matthias Fitzi et al.· IEEE Computer Security Found...· 0 citations
This survey argues that four properties of that layer (irreversibility, signing authority, continuous autonomy, and sequence-level composition) qualitatively change the threat model, turning the recoverable failures of generic agent security into a standing, irreversible loss.
Rabimba Karanjai, Yang Lu, Nour Diallo et al.· 1 citation
We use cookies to run the site and, with your consent, for analytics and to show ads.
See our Cookie Policy.
