Jan 3 in BlockChain
Q: Consensus in Centralized vs Decentralized Systems

1 Answer

Jan 3

The consensus is a fault tolerant mechanism used in blockchain and other distributed systems to reach to an agreement to add or commit a transaction to the database by all the participating nodes.

Consensus mechanisms makes a distributed system truly trustless.

Centralized distributed systems achieve consensus under the fail-stop assumption. This requires that the distributed system agrees on a value in the face of node and link failures but not if a node behaves maliciously.

Decentralized systems are required to operate under Byzantine node failure where a failed node may act maliciously, i.e., they may not respond, or they may send incorrect information.

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