i/k-Contact: A context-aware user authentication using physical social trust. - Shiori Arimura; Masahiro Fujita; Shinya Kobayashi; Junya Kani; Masakatsu Nishigaki; Akira Shiba (PST, 2014)

An Attempt to Memorize Strong Passwords while Playing Games. - Masahiro Fujita; Mako Yamada; Shiori Arimura; Yuki Ikeya; Masakatsu Nishigaki (NBiS, 2015)

Physical trust-based persistent authentication. - Masahiro Fujita; Christian Damsgaard Jensen; Shiori Arimura; Yuki Ikeya; Masakatsu Nishigaki (PST, 2015)