Proof of Stake coins vulnerable to Nothing-at-Stake attacks…
Proof of Stake coins vulnerable to Nothing-at-Stake attacks: "without a provable deviation, we cannot 'punish' suspected deviant miners without the risk of punishing honest but poorly-connected miners". Brown-Cohen et al 2019 on vulnerabilities of PoS
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"all internal pseudorandomness is in the end locally predictable or recent and therefore susceptible to some form of attack"