I couldn't understand if this tendermint protocol is proof-of-stake or something like proof-of-lock?
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1What is proof-of-lock? Vlad Zamfir refers to Temdermint as "a security-deposit based proof-of-stake system".– Sergei TikhomirovAug 3, 2017 at 12:14
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@SergeiTikhomirov Since you have to deposit or "lock" your coins I thought maybe it is called something other than PoS. In Ethereum's PoS I think all coins are eligible for PoS, and there is no concept of "locking". Although I didn't research it thoroughly.– EralpBAug 4, 2017 at 13:07
1 Answer
Yes, it looks like Proof-of-Stake or at least something very similar, and suffers from similar issues, for example:
Note that this does not preclude a 2/3 majority of validators from publishing a blockchain fork after they had unbonded and sold their coins to an unsuspecting party. This is called a long-range double-spend attack. A user can avoid long-range attacks by syncing their blockchain periodically within the bounds of the unbonding period.