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https://twitter.com/Tim_Roughgarden/status/1725205913953345995
https://twitter.com/Tim_Roughgarden/status/1737843254698410267Tl;dr: yes, on all counts, at least if you're willing to adopt the stronger assumptions of the quasi-permissionless (QP) setting! (2/10)
https://twitter.com/Tim_Roughgarden/status/1735425696732791202The short answer is that PBFT-style PoS protocols make stronger assumptions about participation than longest-chain PoS protocols but, if these assumptions hold up, they can offer stronger guarantees like accountability, optimistic responsiveness, and partition-resilience (2/20)
https://twitter.com/Tim_Roughgarden/status/1734736543284121849our dynamically available (DA) setting assumes something that our fully permissionless (FP) setting does not:
https://twitter.com/Tim_Roughgarden/status/1729898971936526580The Bitcoin protocol is remarkable in that it assumes literally nothing about who is running it at any given moment---in our terminology, the protocol works even in the fully permissionless (FP) setting (2/20)
https://twitter.com/Tim_Roughgarden/status/1725205913953345995The Bitcoin protocol solves a classical consensus problem known as "state machine replication (SMR)." In Bitcoin, the "state" is basically the current set of UTXOs. Researchers in distributed computing/systems have worked on SMR protocols since at least the 1980s (2/9)
https://twitter.com/Tim_Roughgarden/status/1537868393457537026The common prefix property states that every pair of longest chains should agree on all but at most their last k blocks.