I'm rereading my mail at once; I've forgotten if I told you this already. Anyway, I just presupposed the same protocol outlined by Chaum in his paper. It's disruptable, but so's any DC-net to begin with. DC-nets presuppose a fair amount of co-operation between their participants. I'd also like to point out that this system indicates that during an attack/disruption on a traditional dc-net, the disruptor can tell what the original person was trying to send, even though noone else can. And then perhaps XOR the data with something offensive, and if the original sender tries to re-send, broadcast the result of the XOR, resulting in a total net output of the offensive material. I'm sure someone's going to try that sooner or later. Phil