Mix Networks are designed to do this, with remailers being implementations of them (although quite out of date, and best studied academically and not relied on. An intro, in blog form, is here: https://crypto.is/blog/
Shared Mailboxes like the usenet group alt.anonymous.messages also are designed to defeat traffic analysis, and are in the same state of disrepair and academic study. I aim to present more about AAM this month: http://defcon.org/html/defcon-21/dc-21-speakers.html#Ritter I agree, I think defeating traffic analysis and metadata collection is crucial - but we don't have many mature tools that aim to do this. Tor is the best example. -tom -- Too many emails? Unsubscribe, change to digest, or change password by emailing moderator at compa...@stanford.edu or changing your settings at https://mailman.stanford.edu/mailman/listinfo/liberationtech
