Yuka Ikebe Takehiro Nakayama Masaji Katagiri Satoshi Kawasaki Hirotake Abe Takahiro Shinagawa Kazuhiko Kato Efficient Anomaly Detection System for Mobile Handsets. 154-160 2008 SECURWARE http://dx.doi.org/10.1109/SECURWARE.2008.16 conf/securware/2008 db/conf/securware/securware2008.html#IkebeNKKASK08