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.
Shoko Imaizumi, Masaaki Fujiyoshi, Hitoshi Kiya, Naokazu Aoki, and Hiroyuki Kobayashi,
“A Key Derivation Scheme for Hierarchical Access Control to JPEG 2000 Coded Images,”
inProc. of Pacific-Rim Symposium on Image and Video Technology, Part II, LNCS 7088, pp.180-191, Gwangju, Korea, 22nd November, 2011.
Shoko Imaizumi, Masaaki Fujiyoshi, and Hitoshi Kiya,
“An Efficient Access Control Scheme for Multimedia Content Using Modified Hash Chain,”
inProc. of IARIA International Conference on Systems and Networks Communications, pp.175-180, Barcelona, Spain, 26th October, 2011.
Shoko Imaizumi, Masaaki Fujiyoshi, and Hitoshi Kiya,
“A Key Generating Method Using Recursive Hash Chains and Its Applications for Multi-Dimensionally Hierarchical Access Control,”
ITE Journal, vol.65, no.2, pp.193-202, February 2011. (in Japanese)
Best Paper Award of ITE Niwa-Takayanagi Prize
Shoko Imaizumi, Yoshito Abe, Masaaki Fujiyoshi, and Hitoshi Kiya,
“An Efficient Access Control Method Based on One-Way Hash Functions for Digital Videos,”
ITE Journal, vol.64, no.11, pp.1621-1627, November 2010. (in Japanese)
Shoko Imaizumi, Masaaki Fujiyoshi, and Hitoshi Kiya,
“An efficient access control method for composite multimedia content,”
IEICE Electronics Express, vol.7, no.20, pp.1534-1538, October 2010.
Shoko Imaizumi, Masaaki Fujiyoshi, and Hitoshi Kiya,
“Efficient Collusion Attack-Free Access Control for JPEG 2000 Coded Images,”
inProc. of APSIPA Annual Summit and Conference, no.MP-P2-6, pp.270-273, Sapporo, Japan, 5th October, 2009.
Shoko Imaizumi, Masaaki Fujiyoshi, and Hitoshi Kiya,
“Efficient Collusion Attack-Free Access Control for Multidimensionally Hierarchical Scalability Content,”
inProc. of IEEE International Symposium on Circuits and Systems, no.A3L-F-4, pp.505-508, Taipei, Taiwan, R.O.C., 25th May, 2009.
Noriaki Hashimoto, Shoko Imaizumi, Masaaki Fujiyoshi, and Hitoshi Kiya,
“Hierarchical Encryption Using Short Encryption Keys for Scalable Access Control of JPEG 2000 Coded Images,”
inProc. of IEEE International Conference on Image Processing, no.WP-PG.4, pp.3116-3119, San Diego, CA, the US, 15th October, 2008.
Shoko Imaizumi, Masaaki Fujiyoshi, Yoshito Abe, and Hitoshi Kiya,
“Collusion Attack-Resilient Hierarchical Encryption of JPEG 2000 Codestreams with Scalable Access Control,”
inProc. of IEEE International Conference on Image Processing, vol.II, no.MP-L5.3, pp.137-140, San Antonio, TX, the U.S., 17th September, 2007.
Masaaki Fujiyoshi, Shoko Imaizumi, and Hitoshi Kiya,
“Encryption of Composite Multimedia Contents for Access Control,”
IEICE Trans. Fundamentals, vol.E90-A, no.3, pp.590-596, March 2007.
Masaaki Fujiyoshi, Wataru Saitou, Shoko Imaizumi, and Hitoshi Kiya,
“Hierarchical Cipher for Controlling Access to Multimedia Contents,”
inProc. of International Technical Conference on CircuitsSystems, Computers and Communications/, vol.II, no.WAM1-4-4, pp.69-72, Chiang Mai, Thailand, 12th July, 2006.
Shoko Imaizumi, Osamu Watanabe, Masaaki Fujiyoshi, and Hitoshi Kiya,
“Generalized Hierarchical Encryption of JPEG 2000 Codestreams for Access Control,”
inProc. of IEEE International Conference on Image Processing, vol.II, no.TuePmPO5.6, pp.1094-1097, Genoa, Italy, 13th September, 2005.