I remember, Kruw. I remember very well. Do you?
It obviously can't. If your coins are refused, you have no idea if it is due to Sybil attack or if Coinfirm has simply decided your coins are naughty and are not allowed to be coinjoined.
I responded to that post, how did you miss it?
It obviously can't. If your coins are refused, you have no idea if it is due to Sybil attack or if Coinfirm has simply decided your coins are naughty and are not allowed to be coinjoined.
You would know because the coin is private, therefore it can't be refused due to its history.
That's fine, I guess. There would be a problem if all premixed coins entered the same coinjoin. But, even if it is problematic, Alice can simply refuse to sign the transaction.
Wouldn't the coordinator be able to gain extra information from pairs of inputs that refuse to participate with each other?