Good addition to the list of potential issues with PoS: since stakers are required to have staking keys online to sign txs, the dynamic validator set is vulnerable to silent key theft & majority attacks. h/t @Datavetaren
Note that this problem is unique to PoS.https://twitter.com/datavetaren/status/1012529987545698305 …
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This weakness can be exploited in combination with other PoS weaknesses for maximum effects. E.g.: attackers can wait until the staking participation level gets low enough, so the number of staking keys/control points is at a minimum.
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