Makoto Otani Katsuhiko Eguchi Hirofumi Eto Kenzi Watanabe Shin-ichi Tadaki Yoshiaki Watanabe Implementation of IPv6 functions for a network user authentication system opengate. 283-286 2005 conf/siguccs/2005 SIGUCCS http://doi.acm.org/10.1145/1099435.1099501 db/conf/siguccs/siguccs2005.html#OtaniEEWTW05