Shoko Imaizumi, Naokazu Aoki, Hiroyuki Kobayashi, and Hitoshi Kiya,
“Multi-dimensional Key Assignment for Hierarchical Media Access Control with Collusion Resilience,”
inProc. of IARIA International Conference on Systems and Networks Communications, pp.77-82, Lisbon, Portugal, 20th November, 2012.
Yuto Tobe, Shoko Imaizumi, Naokazu Aoki, and Hiroyuki Kobayashi,
“A Visible Data Hiding Scheme for Printed Color Images,”
inProc. of IEEE International Symposium on Intelligent Signal Processing and Communication Systems, no.E4.4, pp.653-657, New Taipei City, Taiwan, R.O.C., 6th November, 2012.
Shoko Imaizumi, Naokazu Aoki, Hiroyuki Kobayashi, and Hitoshi Kiya,
“Hierarchical Key Assignment Scheme for Multimedia Access Control with Modified Hash Chain,”
inProc. of IEEE International Conference on Intelligent Information Hiding and Multimedia Signal Processing, no.CM-2.1, pp.293-296, Piraeus, Greece, 20th July, 2012.
Shoko Imaizumi, Masaaki Fujiyoshi, and Hitoshi Kiya,
“A Novel Access Control Scheme for Multimedia Content with Modified Hash Chain,”
inMultimedia – A Multidisciplinary Approach to Complex Issues(edited by Ioannis Karydis), pp.85-98, Intech, March 2012.
Shoko Imaizumi, Masaaki Fujiyoshi, and Hitoshi Kiya,
“Multiple Level Access Control Method for Hierarchical Multimedia Content Using Low-complexity Key Generating Schemes,”
ITE Journal, vol.66, no.2, pp.69-73, February 2012. (in Japanese)
Shoko Imaizumi, Masaaki Fujiyoshi, Hitoshi Kiya, Naokazu Aoki, and Hiroyuki Kobayashi,
“Key Derivation Scheme for Hierarchical Access Control to Multimedia Content,”
inProc. of International Workshop on Advanced Image Technology, no.F-4, pp.246-251, Ho Chi Minh City, Vietnam, 10th January, 2012.
Shoko Imaizumi, Masaaki Fujiyoshi, Hitoshi Kiya, Naokazu Aoki, and Hiroyuki Kobayashi,
“A Key Derivation Scheme for Hierarchical Access Control to JPEG 2000 Coded Images,”
Lect. Notes Comput. Sci., Y. -S. Ho (Ed.), Springer-Verlag, vol.7088, pp.180-191, January 2012.