I have this persistent image of what a great boon all these encrypted networks will be for undercover work. Currently when some species of cop or spy goes undercover they take on a nearly full time acting job. They have to work for a long time to establish their credentials and throughout the process are usually in significant physical danger. I vaguely remember (the details are probably wrong) some Isreali spy got as far as the position of Minister of Defense in Jordan before he got hung. With digital signatures a dozen secretaries could run a hundred or more pseudoagents, build a solid reputation for each over years. The same approach would work for a patient con man. Real credibility has to be tied to a physical body. Some thing at risk. --efrem