The Byzantine generals' problem refers to the challenge of achieving consensus among a group of nodes (aka generals). This is a massive problem in blockchain networks, where the integrity of the network relies on the consensus mechanism.
Some of the problems that could occur are :
- node crashes
- network failures
- malicious attacks
- nodes provide conflicting information
- nodes fail to respond
The problem gets its name from a hypothetical scenario where a group of Byzantine generals is attempting to coordinate an attack on a city. But the generals must communicate with each other through messengers who can be intercepted or corrupted.