This document discusses different consensus protocols used by distributed ledger technologies to allow computers to agree on the state of a distributed ledger despite some computers being faulty or malicious. It lists proof of work, proof of stake, and Byzantine fault tolerance as common consensus protocols, along with examples of distributed ledgers that use each protocol such as Bitcoin using proof of work and EOS using proof of stake. It also mentions alternative consensus protocols including proof of elapsed time, proof of activity, and directed acyclic graphs.

1. Distributed Ledger Technologies by Consensus Protocol
DLT allows a group of computers to come to an agreement amid a minority of malicious or faulty computers
Proof of
Work
• Bitcoin
• Ethereum
• Litecoin
Proof of
Stake
• Oroboros
• EOS
• Bitshare
• Peercoin
• Blackcoin
• NXT
Other
• Proof of Elapsed Time (Sawtooth)
• Proof of Activity (Decred)
• Proof of Location (FOAM, Platin)
• Proof of Importance (NEM)
• Proof of Time Stake
• Proof of Brain
Byzantine
Fault
Tolerance
• Fabric
• Ripple
• NEO
• Stellar
• TON
• Chain
Directed
Acyclic
Graph
• IOTA
• ByteBall
Hash-
graph
• Hedera Hashgraph