2018-01-10

BM怼cardano事件

已收录至 steemit.com

• BM认为ada抄袭（copy）了他的工作，但是没有提他，原文：
  （ Ouroboros is a copy of Delegated Proof of Stake (DPoS) with a few counter-productive modifications. In fact their paper refers to the term “πDPoS” 17 times without mentioning or recognizing any of my prior work.）

• 结果上，BW认为ada的性能和效率完败

• ada的安全在工程上不可行：400公斤的防弹衣没法穿。
• 对DPOS的分析
  • 选人 （Selecting a set of block producers）
  • 排队 （Scheduling the producers into time slots）
• 选人
  • 时间轮： 【BTS:1h】 vs 【Ouroboros：5 days】
  • 参与要求：【Steem：没有下限】 vs 【Ouroboros： at least 1% stake】
• 排队

  • 随机性：

    • Steem ：从确定一组里面随机抽

    uses deterministic scheduling with pseudorandom shuffling

    • Ouroboros ：随机性由随机选定的权益人生成

    sampling from a source of provable randomness created by a committee of randomly selected stakeholders

  • 安全性：

    • Steem / BitShares / EOS 靠投票（人为）

    select a set of unlikely to collude entities by approval voting then schedule them in a pseudorandom order。 同时EOS要取消shuffle （ EOS will be removing the random shuffle all together.）

    • Ouroboros 随机选择导致时间和延时无法预期

    Ouroboros the length of time until 2/3+ of the stake is “randomly selected” is not known. unpredictable latency like bitcoin

• 分布式安全（Distribution Security Issues）
  • Steem 14 people confirm a block each round.
  • 只有投票才能对抗基于stake权重的中心化
    stake-weighted voting creates a very high centralization that can only be countered with approval voting
  • Corruption takes place at the individual level, not the stake level. it is wrong to assume that large stake holders will behave like a group of smaller stakeholders of similar size

转自DAGFans