George Danezis Roger Dingledine Nick Mathewson Mixminion: Design of a Type III Anonymous Remailer Protocol. 2-15 2003 conf/sp/2003 IEEE Symposium on Security and Privacy http://csdl.computer.org/comp/proceedings/sp/2003/1940/00/19400002abs.htm db/conf/sp/sp2003.html#DanezisDM03