Other Mechanisms
PoA, DPoS.
Beyond PoW and PoS
Proof of Work and Proof of Stake are the most famous consensus mechanisms, but many others exist, each trading off decentralization, speed, and trust differently.
This lesson surveys the key alternatives.
Proof of Authority (PoA)
Proof of Authority relies on a small set of pre-approved, identified validators. Their real-world reputation is the stake.
PoA is fast and cheap but more centralized — common in private and test networks.
PoA validators (known identities):
Validator-A (Company X)
Validator-B (Company Y)
Validator-C (Company Z)All lessons in this course
- Proof of Work
- Proof of Stake
- Other Mechanisms
- Finality and Forks