# Decred Review #blockchain [Official References](https://docs.decred.org/research/overview/) - Based on Bitcoin - PoS overlays upon PoW - Add signature algorithms Ed25519 and Schnorr - Use BLAKE-256 as hash algorithm - Enable segwit to solve transaction malleability - Transaction expiration mechanism ## Hybrid Consensus [Decredible | Decred hybrid consensus explained](https://decredible.com/mining/hybrid-consensus/) - PoW miners propose new block. - PoS miners vote whether accepting the block. The ticket should be purchased first. 5 tickets are selected randomly using the new PoW block header. Block is accepted if 3 tickets agree. - Block reward is split between PoW and PoS miners. - PoS tickets are selected using PoW block header. It guaranteed that is has a very high cost to manipulate picking tickets.