There’s been discussion recently about the vulnerabilities of traditional Proof-of-Work, especially regarding selfish mining (like the Qubic attack) and the centralization caused by mining pools.
I’ve begun looking into the “work shares” proposal from Dr. Karl Kreder (aka Dr. K co-founder of Quai Network). There appear to be a few papers that together comprise his conception of “work shares”.
The following summary is generated by LLM. I believe the first two papers are the most applicable to neptune at present, but the third one may be of interest as well.
1. Security Fix: POEM (Proof-of-Entropy-Minima)
This paper is the core security and consensus mechanism. It’s the part that directly addresses selfish mining and fork attacks.
- Paper: POEM: Proof of Entropy Minima
- Link: https://arxiv.org/abs/2303.04305
- Synopsis: This paper introduces a new fork-choice rule to replace the “longest chain” rule. Instead of just “length,” each block is given an “intrinsic weight” based on the actual quality (entropy) of its hash. When two blocks are found at the same time, the entire network can instantly and deterministically choose the one with the “better” hash. This eliminates the ambiguity that selfish miners exploit, neutralizes the attack, and allows for much faster, more secure transaction finality.
2. Decentralization Fix: Optimal Reward Allocation
This paper is the economic model that gets rid of pools. This is the literal “work share” component.
- Paper: Optimal Reward Allocation via Proportional Splitting
- Link: https://docs.qu.ai/learn/academic-resources/whitepapers (This is the official list on the Quai docs, as the paper is pending wider publication).
- Synopsis: This paper provides the formal mechanism for “Proportional Reward Splitting” (PRS). It describes how a blockchain can reward all miners based on the number of low-difficulty “work shares” (partial proofs) they submit. This allows a small, solo miner to receive smooth, low-variance rewards directly from the protocol. It guarantees fair, proportional payouts, which is the only reason miners join pools. By building this into the protocol itself, it makes centralized mining pools economically obsolete.
3. Scalability Framework: BlockReduce
This paper is the foundational architecture that shows how these concepts can be implemented in a highly scalable, sharded network.
- Paper: BlockReduce - Scaling Proof-of-Work Blockchains
- Link: https://www.semanticscholar.org/paper/BlockReduce-Scaling-Proof-of-Work-Blockchains-Georghiades-Kreder/2e8c617173e923e32b896970757270e590af034d
- Synopsis: This is the original paper for the Quai Network architecture. It outlines how to build a hierarchy of many merge-mined blockchains (shards) that all operate in parallel. This shows that the POEM consensus and proportional reward system aren’t just theoretical, but can be applied to a system designed for high throughput (thousands of TPS) while still being secured by Proof-of-Work.
Together, these papers present a unified system: BlockReduce builds the sharded structure, POEM secures it from selfish miners, and Optimal Reward Allocation decentralizes it by eliminating pools. This seems to be the complete academic framework for the “work shares” concept.