以下重點整理摘自 2017 Blockchain Tech Seminar @ NCCU

Following notes are taken from 2017 Blockchain Tech Seminar @ NCCU

<特點 Features>

以保證金為設計的權益證明演算法 (PoS)，高度最終安全，低成本的共識演算法。A proof of stake algorithm with validators.
基於拜占庭容錯 (BFT)：拿到超過 2/3 的票數。 BFT-style proof of stake.
加入懲罰機制。 Adding punishment mechanism.
當區塊鏈收斂成一條鏈 -> 賺錢。 Validators get payment when blockchain converge .

<PoW vs. PoS>

Proof of Work：

耗費大量電力。Consume large quantities of electricity.
礦池集中問題。Issues of centralization risk to pools.
沒有提供經濟確認性 (Economic Finality)。Without economic finality.
礦工不需成本 (只要成為最長的鏈)就能撤銷過去紀錄。Miners can revoke records without cost if he can be the longest chain.

經濟確認性 (Economic Finality)：一個區塊被認為已成定局，假設在同高度上，存在有誤的另一方並課以 X 等量的罰金。

Economic Finality: Economic finality is the idea that once a block is finalize, then the only way that at any point in the future the canonical history will contain a conflicting block is if a large number of people are willing to burn very large amounts of money.

Proof of Stake：

多回合的共識形成 (Checking Point -> Final Checking Point)。Multi-round consensus algorithm.
虛擬挖礦 (Voting會與放置的保證金成正比)。Virtual Mining.
提供經濟確認性 (保證金設計)。Provide Economic Finality.
節能。No need to consume large quantities of electricity.

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