A consensus attack occurs when a group of malicious actors aims to disrupt the normal functioning of a blockchain network. This typically involves taking control of more than 50% of the network’s computational power or validating nodes. By doing so, the attackers can manipulate transactions, double-spend coins, or prevent other transactions from being confirmed. This undermines the trust and reliability that users place in the system.There are various types of consensus attacks, with the most common being the 51% attack. In this scenario, the attackers can reorganize the blockchain, making it difficult for honest participants to have their transactions processed.Consensus attacks can lead to severe consequences, such as loss of funds, decreased network security, and a tarnished reputation for the involved cryptocurrencies. To mitigate the risks, many networks implement mechanisms like proof of stake or other consensus protocols designed to enhance security and incentivize good behavior among participants.