Hal sez: : Wei Dai did some nice statistical analysis of this type of attack : sometime a year or two ago. Even with countermeasures such as you : suggest, if they are not perfect, so some information leaks correlating : incoming and outgoing messages, Wei showed that it was possible to : deduce the owners of the nyms surprisingly quickly. : The countermeasures do work - if you get and send exactly 50 pieces of : 4K byte email every day, no matter what, then correlations don't exist : - but they are expensive to do perfectly. For now we have much worse : weaknesses; none of the current return-address systems are really safe, : other than posting encrypted mail to newsgroups (and even that may be a : problem if they suspect who you are and are monitoring your computer : link to see if you download certain messages). Use ssh or any other link encryptor, or fetch the whole newsgroup using uucp. -- -AJ-