This post introduces the concept of a majority (51%) attack and gives a short account of the role that Decred’s voters play in defending against these. I will briefly describe how majority attacks against Proof of Work (PoW) currencies work first, then explain how the additional Proof of Stake (PoS) component changes the dynamic in Decred’s case.
Performing a double spend attack means having the power to reorg (reorganize, or rewrite) the blockchain.
Governance of the Decred project subsidy through Politeia I’ve recently taken an interest in cryptocurrency projects that are attempting to decentralize various aspects of their governance. Decred is interesting in this regard because it aims to decentralize decision-making about both:
the adoption of consensus changes that require hard forks the spending of a project subsidy (10% of the block reward) Decred Governance Basics Decred combines Proof of Work (PoW, 60% of block reward) with Proof of Stake (PoS: 30% of block reward) to secure the network, with the remaining 10% of the block reward going into a project subsidy wallet to fund development of the project.