consensus algorithm

A consensus algorithm is a set of rules that a group of computers follows to agree on a single version of data or a shared decision, even if some computers fail or act maliciously. Think of it like a team voting on a decision: the algorithm ensures that everyone’s vote is counted fairly, and the group reaches a unanimous or majority agreement. This is essential in decentralized systems, like cryptocurrencies, where there’s no central authority. It helps maintain trust, consistency, and security across the network by synchronizing all participants’ views.