Could you explain what you mean in 4 and 8? Not sure of terminology -- which of those corresponds to my "include an extra header in email which authenticates the update. Users send around the latest update in emails they send, so that clients learn in a p2p fashion from other people, from new clients (which would start with latest version) and so on", and what the other type of broadcast entails? (Is other type DNS?) Do you find the above "good enough" -- ie simple, generally likely to be effective. Adam On Tue, Apr 20, 2004 at 05:03:05PM -0400, Eric S. Johansson wrote: > maybe we should create a small page about the trade-offs of the four > different techniques we know about today for managing postage? > > 1) challenge response (nobody's favorite) > 2) increase by the clock > 4) passive broadcast (my favorite) > 8) active broadcast (i.e. full and partial injection) > > ---eric >