[hjorthjort]

> and one would need more than half of that total stake to have a chance at attacking the network

Actually 1/3rd to disrupt consensus, and 2/3rds + 1 to take control of the chain like you could with a 51% attack on a PoW chain, only you'd get almost immediate and complete control over the consensus.

[throw_away_moth]

The strength required to take control is probably 1/3 as it is with most Byzantine setups. (The 1/3 control attack against Bitcoin is selfish mining.)

[hjorthjort]

You can't control the network with 1/3 with BFT consensus, you need 2/3rds.