> Therefore, we assume that the bank faithfully executes the > protocol and only makes observations that are part of that > protocol. In particular, he does n

> Therefore, we assume that the bank faithfully executes the > protocol and only makes observations that are part of that > protocol. In particular, he does not act as an onion > router or as a client, only observes messages that are > sent to him, and does not collude with the network > adversary. "Not collude" part worries me. Can anyone smart enough comment on this?