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The problem with POS is that you do not have a mathematical guarantee of immutability. It costs nothing to try to stake on different blocks, and every counter-m
by spiorf 9y ago
The problem with POS is that you do not have a mathematical guarantee of immutability. It costs nothing to try to stake on different blocks, and every counter-measure relies on the fact that the network is not partitioned.
This would be fatal in case of a remote crash vulnerability, because an attacker could partition the network at will.
Or a nation/state could cut internet access.
Without real world energy, you lose byzantine fault tolerance.
- _coldfire 9y agoThe only proven countermeasure so far is delegated proof of stake, which has "trusted" parties doing the staking. But this goes against the idea of decentralisation. Some people wonder if pure proof-of-stake is even possible. Ethereum is likely going with DPOS, yet to see a single solution to the nothing-at-stake problem.