Title: Understanding the public, private and consortium consensus algorithms in blockchain technology

Authors: Sonia Singh; Arun Kumar; Mamta Kathuria

Addresses: Shyam Lal College (Eve.), University of Delhi, India ' Department of Mathematics, Baba Mastnath University, Rohtak, India ' J.C. Bose University of Science and Technology, YMCA, Faridabad, India

Abstract: Blockchain has become one of the most demanding technologies of the decade. Blockchain is a decentralised digital record of information stored in a form of blocks in a chain of blocks called blockchain. It is totally dependent on the addition of new block in its chain. At a single time, there are a number of blocks ready to be added in the blockchain; choosing one valid block from this number of blocks is a complex and most important part of blockchain architecture. As we know that blockchain is a non-centralised system, it has peer-to-peer network in which blocks are added one by one to the chain of blocks only when a consensus is reached amongst the participants of the network. This paper presents a theory summarising of some consensus algorithm used in public, private and consortium blockchain technology along with pros and cons of each algorithms.

Keywords: blockchain technology; consensus algorithms; consortium blockchain; private blockchain; public blockchain.

DOI: 10.1504/IJBC.2022.126285

International Journal of Blockchains and Cryptocurrencies, 2022 Vol.3 No.3, pp.269 - 288

Received: 13 Jan 2022
Accepted: 12 Jun 2022

Published online: 18 Oct 2022 *

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