Speaking of micropayments, Mark Manasse, Ron Rivest, Adi Shamir, and Silvio Micali did another talk on Friday which touched on several cool micropayment schemes, and a much more cost-effective way to do key revocation. Though I got there exactly 6 minutes late, I missed one presentation, and didn't take any notes for the rest. Hope someone else here did. I saw lots of DCSB/Cypherpunks there... Any takers?
A reference for Mark's paper on Millicent is <a href="http://www.w3.org/pub/Conferences/WWW4/Papers/246/">The Millicent Protocol for Inexpensive Electronic Commerce</a> Of all the various payment protocols I've seen, this was one of the few that studied the available protocol bandwidth before designing a protocol. Folks with an engineering slant should appreciate the work here. I would be VERY interested in URL's and summaries of Micali's talk. (I really wanted to go but after spending most of the week at the WWW4 conference I had to commit serious time to being anchored to the office.) /r$