Partial-scrambling of images encoded using JPEG2000 without generating marker codes. - Hitoshi Kiya; Shoko Imaizumi; Osamu Watanabe 002 (ICIP (3), 2003)

Generalized hierarchical encryption of JPEG 2000 codestreams for access control. - Shoko Imaizumi; Osamu Watanabe 002; Masaaki Fujiyoshi; Hitoshi Kiya (ICIP (2), 2005)

Collusion Attack-Resilient Hierarchical Encryption of JPEG 2000 Codestreams with Scalable Access Control. - Shoko Imaizumi; Masaaki Fujiyoshi; Yoshito Abe; Hitoshi Kiya (ICIP (2), 2007)

Encryption of Composite Multimedia Contents for Access Control. - Masaaki Fujiyoshi; Shoko Imaizumi; Hitoshi Kiya (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2007)

Hierarchical encryption using short encryption keys for scalable access control of JPEG 2000 coded images. - Noriaki Hashimoto; Shoko Imaizumi; Masaaki Fujiyoshi; Hitoshi Kiya (ICIP, 2008)

Efficient Collusion Attack-free Access Control for Multidimensionally Hierarchical Scalability Content. - Shoko Imaizumi; Masaaki Fujiyoshi; Hitoshi Kiya (ISCAS, 2009)

An efficient access control method for composite multimedia content. - Shoko Imaizumi; Masaaki Fujiyoshi; Hitoshi Kiya (IEICE Electron. Express, 2010)

A Key Derivation Scheme for Hierarchical Access Control to JPEG 2000 Coded Images. - Shoko Imaizumi; Masaaki Fujiyoshi; Hitoshi Kiya; Naokazu Aoki; Hiroyuki Kobayashi (PSIVT (2), 2011)

Hierarchical Key Assignment Scheme for Multimedia Access Control with Modified Hash Chain. - Shoko Imaizumi; Naokazu Aoki; Hiroyuki Kobayashi; Hitoshi Kiya (IIH-MSP, 2012)

A visible data hiding scheme for printed color images. - Yuto Tobe; Shoko Imaizumi; Naokazu Aoki; Hiroyuki Kobayashi (ISPACS, 2012)

A collusion-free key assignment scheme for hierarchical access control using recursive hash chains. - Shoko Imaizumi (ISCAS, 2013)

Multibit Embedding Algorithm for Steganography of Palette-Based Images. - Shoko Imaizumi; Kei Ozawa (PSIVT, 2013)

Hierarchical scrambling scheme for palette-based images. - Anu Aryal; Shoko Imaizumi; Naokazu Aoki (ISPACS, 2014)

Improvement of Multi-bit Information Embedding Algorithm for Palette-Based Images. - Anu Aryal; Kazuma Motegi; Shoko Imaizumi; Naokazu Aoki (ISC, 2015)

Scalable Tamper Detection and Localization Scheme for JPEG2000 Codestreams. - Takeshi Ogasawara; Shoko Imaizumi; Naokazu Aoki (PCM (2), 2015)

A Robust Identification Scheme for JPEG XR Images with Various Compression Ratios. - Hiroyuki Kobayashi; Shoko Imaizumi; Hitoshi Kiya (PSIVT, 2015)

An Encryption-then-Compression System for JPEG/Motion JPEG Standard. - Kenta Kurihara; Masanori Kikuchi; Shoko Imaizumi; Sayaka Shiota; Hitoshi Kiya (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2015)

Integrated algorithm for block-permutation-based encryption with reversible data hiding. - Anu Aryal; Shoko Imaizumi; Takahiko Horiuchi; Hitoshi Kiya (APSIPA, 2017)

Block-Permutation-Based Encryption Scheme with Enhanced Color Scrambling. - Shoko Imaizumi; Takeshi Ogasawara; Hitoshi Kiya (SCIA (1), 2017)

An Encryption-then-Compression System for Lossless Image Compression Standards. - Kenta Kurihara; Shoko Imaizumi; Sayaka Shiota; Hitoshi Kiya (IEICE Trans. Inf. Syst., 2017)

A Block-Permutation-Based Image Encryption Allowing Hierarchical Decryption. - Yusuke Izawa; Shoko Imaizumi; Hitoshi Kiya (APSIPA, 2018)

Grayscale-Based Block Scrambling Image Encryption for Social Networking Services. - Warit Sirichotedumrong; Tatsuya Chuman; Shoko Imaizumi; Hitoshi Kiya (ICME, 2018)

A Block-Permutation-Based Encryption Scheme with Independent Processing of RGB Components. - Shoko Imaizumi; Hitoshi Kiya (IEICE Trans. Inf. Syst., 2018)

Integrated Model of Image Protection Techniques. - Anu Aryal; Shoko Imaizumi; Takahiko Horiuchi; Hitoshi Kiya (J. Imaging, 2018)

A Reversible Data Hiding Scheme Using Difference Values Based on Similarity between Adjacent Pixels. - Hinata Seguchi; Shoko Imaizumi (GCCE, 2019)

A Reversible Data Hiding Scheme for Printing with Special Color Inks Using Digital Halftoning. - Minagi Ueda; Shoko Imaizumi (GCCE, 2019)

Flexible Data Hiding and Extraction in EtC Images. - Ryoichi Hirasawa; Shoko Imaizumi; Hitoshi Kiya (APSIPA, 2020)

Perceptual Collation Method for Multi-Level Color Halftone Image Based on Visual Characteristics. - Ren Nakamura; Takahiko Horiuchi; Midori Tanaka; Shoko Imaizumi; Tomoyuki Takanashi (CVCS, 2020)

A Reversible Data Hiding Method in Compressible Encrypted Images. - Shoko Imaizumi; Yusuke Izawa; Ryoichi Hirasawa; Hitoshi Kiya (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2020)

A Flexible Reversible Data Hiding Method in Compressible Encrypted Images. - Ryota Motomura; Shoko Imaizumi; Hitoshi Kiya (APSIPA ASC, 2021)

An Extended Reversible Data Hiding Method for HDR Images Using Edge Estimation. - Minagi Ueda; Shoko Imaizumi; KokSheik Wong (APSIPA ASC, 2021)

An Efficient Data Hiding Method Using Correlation Coefficients among Index Colors for Palette-Based Images. - Eichi Arai; Shoko Imaizumi (GCCE, 2021)

A Perception-Based Collation Method Using CNN for Color Halftone Images. - Yuto Matsuoka; Shoko Imaizumi; Takahiko Horiuchi (GCCE, 2021)

An MSB Prediction-Based Method with Marker Bits for Reversible Data Hiding in Encrypted Images. - Ryoichi Hirasawa; Shoko Imaizumi; Hitoshi Kiya (LifeTech, 2021)

A Lossless Image Processing Method with Contrast and Saturation Enhancement. - Yuki Sugimoto; Shoko Imaizumi (MMSP, 2021)

Reversible Data Hiding Associated with Digital Halftoning That Allows Printing with Special Color Ink by Using Single Color Layer. - Minagi Ueda; Shoko Imaizumi (CoRR, 2021)

Application of Reversible Data Hiding for Printing with Special Color Inks to Preserve Compatibility with Normal Printing. - Kotoko Hiraoka; Kensuke Fukumoto; Takashi Yamazoe; Norimichi Tsumura; Satoshi Kaneko; Wataru Arai; Shoko Imaizumi (CoRR, 2021)

A Reversible Data Hiding Method in Encrypted Images for Controlling Trade-Off between Hiding Capacity and Compression Efficiency. - Ryota Motomura; Shoko Imaizumi; Hitoshi Kiya (J. Imaging, 2021)

A Reversible Data Hiding Method in Compressible Encrypted Domain for OpenEXR Images. - Noa Kikuchi; Shoko Imaizumi (GCCE, 2022)

An Extension of High-Capacity Reversible Data Hiding in Encrypted Images with Bit-Plane Partition. - Eichi Arai; Shoko Imaizumi (ICCE-TW, 2022)

A Reversible Image Processing Method with Selectable Functions. - Yuki Sugimoto; Shoko Imaizumi (ISPACS, 2022)

An Overview of Compressible and Learnable Image Transformation with Secret Key and Its Applications. - Hitoshi Kiya; AprilPyone MaungMaung; Yuma Kinoshita; Shoko Imaizumi; Sayaka Shiota (CoRR, 2022)

High-Capacity Reversible Data Hiding in Encrypted Images with Flexible Restoration. - Eichi Arai; Shoko Imaizumi (J. Imaging, 2022)

Privacy-Preserving Semantic Segmentation Using Vision Transformer. - Hitoshi Kiya; Teru Nagamori; Shoko Imaizumi; Sayaka Shiota (J. Imaging, 2022)

An Extension of Reversible Image Enhancement Processing for Saturation and Brightness Contrast. - Yuki Sugimoto; Shoko Imaizumi (J. Imaging, 2022)

A Reversible Image Processing Method for Color Tone Control Using Data Hiding. - Daichi Nakaya; Shoko Imaizumi (APSIPA ASC, 2023)

Effects of Data Hiding on Vision Transformer Classification for Encryption-then-Compression Images. - Kosuke Abe; Shoko Imaizumi; Hitoshi Kiya (GCCE, 2023)

Effects of JPEG Compression on Vision Transformer Image Classification for Encryption-then-Compression Images. - Genki Hamano; Shoko Imaizumi; Hitoshi Kiya (Sensors, 2023)

On the Security of Bitstream-level JPEG Encryption with Restart Markers. - Mare Hirose; Shoko Imaizumi; Hitoshi Kiya (APSIPA, 2024)

Enhancing Security Using Random Binary Weights in Privacy-Preserving Federated Learning. - Hiroto Sawada; Shoko Imaizumi; Hitoshi Kiya (APSIPA, 2024)

Effective Fine-Tuning of Vision Transformers with Low-Rank Adaptation for Privacy-Preserving Image Classification. - Haiwei Lin; Shoko Imaizumi; Hitoshi Kiya (CoRR, 2025)