Hi,
I have not read the whole thread in the links but if it is a 2of2 MultiSig then it is the initial concept i tried out which turned out that it is unsafe regarding blackmail.
as the deposit is async the party with less money locked can blackmial the other in sending a pre-signed blackmial payout tx. that way its rational to accept the blackmail.
If the concept you mentioned is differnt to that what I assumed, can you describe it quickly? I don't have much time yet for reading too much...
The deposit is not async! You simply don't understand.
Both parties deposit to the 2 of 2 in the same transaction. You need to read the whitepaper more carefully next time. You realize you can have as many parties as you want on the same tx?
Also while in escrow there is a bomb transaction so its timed.
Lastly, when both parties are in escrow they could be in 1:1 or 2:1 (remember it was all done in one transaction, temporary transactions were only used to make the bomb)
Even if they are in 2:1 in escrow, an extortionist would not be able to profit since his funds are also at risk thus any extortion would obviously result in the loss of his deposit as well.