Hirokazu Ishizuka

Cryptographic communication device

Tsuyoshi Nishioka, Toshio Hasegawa, Hirokazu Ishizuka, 2002 .

A Zero-Watermarking-Like Steganography and Potential Applications

Kouichi Sakurai, Isao Echizen, Keiichi Iwamura, 2014, 2014 Tenth International Conference on Intelligent Information Hiding and Multimedia Signal Processing.

Quantum cryptanalysis of block ciphers

Akihiro Yamamura, Hirokazu Ishizuka, H. Ishizuka, 2000 .

Secure Hyperelliptic Cryptosystems and Their Performances

Kouichi Sakurai, Yasuyuki Sakai, Hirokazu Ishizuka, 1998, Public Key Cryptography.

On weak RSA-keys produced from Pretty Good Privacy

Kouichi Sakurai, Yasuyuki Sakai, Hirokazu Ishizuka, 1997, ICICS.

Evaluation of a Zero-Watermarking-Type Steganography

Kouichi Sakurai, Isao Echizen, Keiichi Iwamura, 2014, IWDW.

Error Detection and Authentication in Quantum Key Distribution

Akihiro Yamamura, Hirokazu Ishizuka, 2001, ACISP.

Preliminary Evaluation of the Connection Network for the Multi-PSI System

Eiji Sugino, Kanae Masuda, Kazuo Taki, 1988, ECAI.

Evaluation of Matching Accuracy of Template Matching Using a Steganography Algorithm

Kouichi Sakurai, Isao Echizen, Keiichi Iwamura, 2015, 2015 Third International Symposium on Computing and Networking (CANDAR).

Reply to: “Comment on: ‘How much security does Y-00 protocol provide us?’ ” [Phys. Lett. A 346 (2005) 1]

Hideki Imai, Tsuyoshi Nishioka, Hirokazu Ishizuka, 2005 .

How much security does Y-00 protocol provide us?

Hideki Imai, Tsuyoshi Nishioka, Hirokazu Ishizuka, 2004 .