Shoko IMAIZUMI

A Reversible Data Hiding Method in Compressible Encrypted Images
Shoko IMAIZUMI Yusuke IZAWA Ryoichi HIRASAWA Hitoshi KIYA 
Publication:   
Publication Date: 2020/12/01
Vol. E103-A  No. 12  pp. 1579-1588
Type of Manuscript:  Special Section PAPER (Special Section on Smart Multimedia & Communication Systems)
Category: Cryptography and Information Security
Keyword: 
reversible data hiding, compressible encryption, image histogram, image retrieval, 
 Summary | Full Text:PDF(6.3MB)
A Block-Permutation-Based Encryption Scheme with Independent Processing of RGB Components
Shoko IMAIZUMI Hitoshi KIYA 
Publication:   
Publication Date: 2018/12/01
Vol. E101-D  No. 12  pp. 3150-3157
Type of Manuscript:  PAPER
Category: Image Processing and Video Processing
Keyword: 
block-permutation-based encryption, image scrambling, jigsaw puzzle solver, image compression, key space, 
 Summary | Full Text:PDF(2.7MB)
An Encryption-then-Compression System for Lossless Image Compression Standards
Kenta KURIHARA Shoko IMAIZUMI Sayaka SHIOTA Hitoshi KIYA 
Publication:   
Publication Date: 2017/01/01
Vol. E100-D  No. 1  pp. 52-56
Type of Manuscript:  Special Section LETTER (Special Section on Enriched Multimedia —New Technology Trends in Creation, Utilization and Protection of Multimedia Information—)
Category: 
Keyword: 
Encryption-then-Compression system, lossless compression, international standard, JPEG XR, JPEG-LS, 
 Summary | Full Text:PDF(928.6KB)
An Encryption-then-Compression System for JPEG/Motion JPEG Standard
Kenta KURIHARA Masanori KIKUCHI Shoko IMAIZUMI Sayaka SHIOTA Hitoshi KIYA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2015/11/01
Vol. E98-A  No. 11  pp. 2238-2245
Type of Manuscript:  Special Section PAPER (Special Section on Smart Multimedia & Communication Systems)
Category: 
Keyword: 
Encryption-then-Compression system, perceptual encryption, JPEG, color image, cryptographic hash function, 
 Summary | Full Text:PDF(5.5MB)
Encryption of Composite Multimedia Contents for Access Control
Masaaki FUJIYOSHI Shoko IMAIZUMI Hitoshi KIYA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2007/03/01
Vol. E90-A  No. 3  pp. 590-596
Type of Manuscript:  Special Section PAPER (Special Section on Multimedia and Mobile Signal Processing)
Category: Image
Keyword: 
multimedia communication, access control, cryptography, image coding, Internet, 
 Summary | Full Text:PDF(807.3KB)