Categorizing consensus

We propose the following consensus categories

• Proof of Work

• Chain-based Proof of Stake (includes LPoS, Proof of Importance)

• PBFT and BFT-based Proof of Stake (includes DPoS, Ouroboros, Byteball, and PBFT)

• Hybrid models: Proof of Activity and hybrid PoW/PoS

• Proof of Burn (shares some characteristics with chain-based Proof of Stake)

• Proof of Capacity/Space (shares some characteristics with PoW but also suffers from a [lighter] Nothing-at-stake problem)

• Trusted computing algorithms (e.g. PoET)

• DAGs are mostly using a DPoS-like algorithm, (except IOTA, which uses PoW)