Ashutosh Dutta Tao Zhang Sunil Madhani Kenichi Taniuchi Kensaku Fujimoto Yasuhiro Katsube Yoshihiro Ohba Henning Schulzrinne Secure universal mobility for wireless Internet. 45-57 2005 9 Mobile Computing and Communications Review 3 http://doi.acm.org/10.1145/1094549.1094557 db/journals/sigmobile/sigmobile9.html#DuttaZMTFKOS05