Mare Hirose, Shoko Imaizumi, and Hitoshi Kiya,
“On the Security of Bitstream-level JPEG Encryption with Restart Markers,”
inProc. of APSIPA Annual Summit and Conference, Macau, China, 5th November, 2024.
Hiroto Sawada, Shoko Imaizumi, and Hitoshi Kiya,
“Enhancing Security Using Random Binary Weights in Privacy-Preserving Federated Learning,”
inProc. of APSIPA Annual Summit and Conference, Macau, China, 5th November, 2024.
Haiwei Lin, Shoko Imaizumi, and Hitoshi Kiya,
“Privacy-Preserving ConvMixer Without Any Accuracy Degradation Using Compressible Encrypted Images,”
Information, vol.15, no.723, November 2024.
Mare Hirose, Shoko Imaizumi, and Hitoshi Kiya,
“Encryption Method for JPEG Bitstreams for Partially Disclosing Visual Information,”
Electronics, vol.13, no.2016, May 2024.
Kosuke Abe, Shoko Imaizumi, and Hitoshi Kiya,
“Effects of Data Hiding on Vision Transformer Classification for Encryption-Then-Compression Images,”
inProc. of IEEE Global Conference on Consumer Electronics, pp.798-800, Nara, Japan, 12th October, 2023.
Ryota Motomura, Shoko Imaizumi, and Hitoshi Kiya,
“Reversible Data Hiding in Compressible Encrypted Images with Capacity Enhancement,”
APSIPA Trans. Signal Inf. Process., vol.12, no.1, July 2023.
Genki Hamano, Shoko Imaizumi, and Hitoshi Kiya,
“Effects of JPEG Compression on Vision Transformer Image Classification for Encryption-then-Compression Images,”
Sensors, vol.23, no.3400, March 2023.
Genki Hamano, Shoko Imaizumi, and Hitoshi Kiya,
“Image Classification Using Vision Transformer for EtC Images,”
inProc. of APSIPA Annual Summit and Conference, pp.1506-1513, Chiang Mai, Thailand (online), 10th November, 2022.
Ryota Motomura, Shoko Imaizumi, and Hitoshi Kiya,
“A Reversible Data Hiding Method with Prediction-Error Expansion in Compressible Encrypted Images,”
Appl. Sci., vol.12, no.9418, September 2022.
Hitoshi Kiya, Teru Nagamori, Shoko Imaizumi, and Sayaka Shiota,
“Privacy-Preserving Semantic Segmentation Using Vision Transformer,”
J. Imaging, vol.8, no.233, August 2022.
Hitoshi Kiya, April Pyone Maung Maung, Yuma Kinoshita, Shoko Imaizumi, and Sayaka Shiota,
“An Overview of Compressible and Learnable Image Transformation with Secret Key and Its Applications,”
APSIPA Trans. Signal Inf. Process., vol.11, no.1, May 2022.
Ryota Motomura, Shoko Imaizumi, and Hitoshi Kiya,
“A Flexible Reversible Data Hiding Method in Compressive Encrypted Images,”
inProc. of APSIPA Annual Summit and Conference, pp.1794-1799, Tokyo, Japan, 16th December, 2021.
Ryota Motomura, Shoko Imaizumi, and Hitoshi Kiya,
“A Reversible Data Hiding Method in Encrypted Images for Controlling Trade-Off between Hiding Capacity and Compression Efficiency,”
J. Imaging, vol.7, no.268, December 2021.
Ryoichi Hirasawa, Shoko Imaizumi, and Hitoshi Kiya,
“An MSB Prediction-Based Method with Marker Bits for Reversible Data Hiding in Encrypted Images,”
inProc. of IEEE Global Conference on Life Sciences and Technologies, pp.48-50, Nara, Japan, 9th March, 2021.
Ryoichi Hirasawa, Shoko Imaizumi, and Hitoshi Kiya,
“Flexible Data Hiding and Extraction in EtC Images,”
inProc. of APSIPA Annual Summit and Conference, no.B-2-2.2, pp.1347-1351, Auckland, New Zealand (online), 9th December, 2020.
Shoko Imaizumi, Yusuke Izawa, Ryoichi Hirasawa, and Hitoshi Kiya,
“A Reversible Data Hiding Method in Compressible Encrypted Images,”
IEICE Trans. Fundamentals, vol.E103-A, no.12, pp.1579-1588, December 2020.
Shoko Imaizumi and Hitoshi Kiya,
“A Block-Permutation-Based Encryption Scheme with Independent Processing of RGB Components,”
IEICE Trans. Inf. & Syst., vol.E101-D, no.12, pp.3150-3157, December 2018.
Yusuke Izawa, Shoko Imaizumi, and Hitoshi Kiya,
“A Block-Permutation-Based Image Encryption Allowing Hierarchical Decryption,”
inProc. of APSIPA Annual Summit and Conference, no.TH-A1-4.1, Honolulu, USA, 15th November, 2018.
Warit Sirichotedumrong, Tatsuya Chuman, Shoko Imaizumi, and Hitoshi Kiya,
“Grayscale-based Block Scrambling Image Encryption for Social Networking Services,”
inProc. IEEE International Conference on Multimedia and Expo, San Diego, USA, 23rd July, 2018.
Anu Aryal, Shoko Imaizumi, Takahiko Horiuchi, and Hitoshi Kiya,
“Integrated Model of Image Protection Techniques,”
J. Imaging, vol.4, no.1, January 2018.
Anu Aryal, Shoko Imaizumi, Takahiko Horiuchi, and Hitoshi Kiya,
“Integrated Algorithm for Block-Permutation-Based Encryption with Reversible Data Hiding,”
inProc. of APSIPA Annual Summit and Conference, no.WA-08.2, Kuala Lumpur, Malaysia, 13th December, 2017.
Shoko Imaizumi, Takeshi Ogasawara, and Hitoshi Kiya,
“Block-Permutation-Based Encryption Scheme with Enhanced Color Scrambling,”
inProc. of Scandinavian Conference on Image Analysis, LNCS 10269, pp.562-573, Tromso, Norway, 13th June, 2017.
Shoko Imaizumi, Takeshi Ogasawara, and Hitoshi Kiya,
“Block-Permutation-Based Encryption Scheme with Enhanced Color Scrambling,”
Lect. Notes Comput. Sci., P. Sharma, F. Bianchi (Eds.), Springer-Verlag, vol.10269, pp.562-573, May 2017.
Kenta Kurihara, Shoko Imaizumi, Sayaka Shiota, and Hitoshi Kiya,
“An Encryption-then-Compression System for Lossless Image Compression Standards,”
IEICE Trans. Inf. & Syst., vol.E100-D, no.1, pp.52-56, January 2017.
Hiroyuki Kobayashi, Shoko Imaizumi, and Hitoshi Kiya,
“A Robust Identification Scheme for JPEG XR Images with Various Compression Ratios,”
Lect. Notes Comput. Sci., T. Bräunl, B. McCane, M. Rivera, and X. Yu (Eds.), Springer-Verlag, vol.9431, pp.38-50, February 2016.
Hiroyuki Kobayashi, Shoko Imaizumi, and Hitoshi Kiya,
“A Robust Identification Scheme for JPEG XR Images with Various Compression Ratios,”
inProc. of Pacific-Rim Symposium on Image and Video Technology, LNCS 9431, pp.38-50, Auckland, New Zealand, 25th November, 2015.
Kenta Kurihara, Masanori Kikuchi, Shoko Imaizumi, Sayaka Shiota, and Hitoshi Kiya,
“An Encryption-then-Compression System for JPEG / Motion JPEG Standard,”
IEICE Trans. Fundamentals, vol.E98-A, no.11, pp.2238-2245, November 2015.
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.
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.
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.
Hitoshi Kiya, Shoko Imaizumi, and Osamu Watanabe,
“Partial-Scrambling of JPEG2000 Images without Generating Marker Codes,”
IEICE Trans., vol.J86-D-II, no.11, pp.1628-1636, November 2003. (in Japanese)
Hitoshi Kiya, Shoko Imaizumi, and Osamu Watanabe,
“Partial-Scrambling of Image Encoded Using JPEG2000 without Generating Marker Codes,”
inProc. of IEEE International Conference on Image Processing, no.WA-P1.3, pp.III-205-208, Barcelona, Spain, 17th September, 2003.
Shoko Imaizumi, Ayuko Takagi, and Hitoshi Kiya,
“Lossless Inter-Frame Video Coding Using Extended JPEG2000,”
inProc. of International Technical Conference on CircuitsSystems, Computers and Communications/, Phuket, Thailand, 1st July, 2002.