Tatsuya CHUMAN

Image Manipulation Specifications on Social Networking Services for Encryption-then-Compression Systems
Tatsuya CHUMAN Kenta IIDA Warit SIRICHOTEDUMRONG Hitoshi KIYA 
Publication:   
Publication Date: 2019/01/01
Vol. E102-D  No. 1  pp. 11-18
Type of Manuscript:  Special Section PAPER (Special Section on Enriched Multimedia — Making Multimedia More Convenient and Safer —)
Category: 
Keyword: 
JPEG, image encryption, EtC system, social media, 
 Summary | Full Text:PDF
Security Evaluation for Block Scrambling-Based Image Encryption Including JPEG Distortion against Jigsaw Puzzle Solver Attacks
Tatsuya CHUMAN Hitoshi KIYA 
Publication:   
Publication Date: 2018/12/01
Vol. E101-A  No. 12  pp. 2405-2408
Type of Manuscript:  Special Section LETTER (Special Section on Signal Design and Its Applications in Communications)
Category: Image
Keyword: 
jigsaw puzzle, JPEG, encryption, EtC system, 
 Summary | Full Text:PDF
On the Security of Block Scrambling-Based EtC Systems against Extended Jigsaw Puzzle Solver Attacks
Tatsuya CHUMAN Kenta KURIHARA Hitoshi KIYA 
Publication:   
Publication Date: 2018/01/01
Vol. E101-D  No. 1  pp. 37-44
Type of Manuscript:  Special Section PAPER (Special Section on Enriched Multimedia — Potential and Possibility of Multimedia Contents for the Future —)
Category: 
Keyword: 
jigsaw puzzle, JPEG, encryption, EtC system, 
 Summary | Full Text:PDF