Masaki Imai, Tetsutaro Uehara, Shuhui Hou, Hiroshi Ueda, Yu Tsuda, Hajime Kita, A Document Management System to Specify the Source of Information Leakages, the 29th Symposium on Cryptography and Information Security (SCIS2012), pp.1-8, Jan.30-Feb.2, 2012.
+