Improvement of security in cloud systems based on steganography. - Kazuki Murakami; Ryota Hanyu; Qiangfu Zhao; Yuya Kaneda (iCAST/UMEDIA, 2013)

Verification of an image morphing based technology for improving the security in cloud storage services. - Ryota Hanyu; Kazuki Murakami; Qiangfu Zhao (ISIC, 2014)

A new steganography protocol for improving security of cloud storage services. - Kazuki Murakami; Qiangfu Zhao; Ryota Hanyu (ISIC, 2014)

A new protocol for on-line user identification based on hand-writing characters. - Ryota Hanyu; Qiangfu Zhao; Yuya Kaneda (SSCI, 2016)