Improving Immunity of Feistel Ciphers against Differential Cryptanalysis by Using Multiple MDS Matrices. - Taizo Shirai; Kyoji Shibutani (FSE, 2004)

On Feistel Structures Using a Diffusion Switching Mechanism. - Taizo Shirai; Kyoji Shibutani (FSE, 2006)

The 128-Bit Blockcipher CLEFIA (Extended Abstract). - Taizo Shirai; Kyoji Shibutani; Toru Akishita; Shiho Moriai; Tetsu Iwata (FSE, 2007)

A Practical DPA Countermeasure with BDD Architecture. - Toru Akishita; Masanobu Katagi; Yoshikazu Miyato; Asami Mizuno; Kyoji Shibutani (CARDIS, 2008)

Preimage Attacks on Reduced Tiger and SHA-2. - Takanori Isobe 001; Kyoji Shibutani (FSE, 2009)

On the Diffusion of Generalized Feistel Structures Regarding Differential and Linear Cryptanalysis. - Kyoji Shibutani (Selected Areas in Cryptography, 2010)

Double SP-Functions: Enhanced Generalized Feistel Networks - Extended Abstract. - Andrey Bogdanov; Kyoji Shibutani (ACISP, 2011)

Piccolo: An Ultra-Lightweight Blockcipher. - Kyoji Shibutani; Takanori Isobe 001; Harunaga Hiwatari; Atsushi Mitsuda; Toru Akishita; Taizo Shirai (CHES, 2011)

Analysis of 3-line generalized Feistel networks with double SD-functions. - Andrey Bogdanov; Kyoji Shibutani (Inf. Process. Lett., 2011)

Security Analysis of the Lightweight Block Ciphers XTEA, LED and Piccolo. - Takanori Isobe 001; Kyoji Shibutani (ACISP, 2012)

Converting Meet-In-The-Middle Preimage Attack into Pseudo Collision Attack: Application to SHA-2. - Ji Li; Takanori Isobe 001; Kyoji Shibutani (FSE, 2012)

All Subkeys Recovery Attack on Block Ciphers: Extending Meet-in-the-Middle Approach. - Takanori Isobe 001; Kyoji Shibutani (Selected Areas in Cryptography, 2012)

Generalized Feistel networks revisited. - Andrey Bogdanov; Kyoji Shibutani (Des. Codes Cryptogr., 2013)

Towards the optimality of Feistel ciphers with substitution-permutation functions. - Kyoji Shibutani; Andrey Bogdanov (Des. Codes Cryptogr., 2014)

Midori: A Block Cipher for Low Energy. - Subhadeep Banik; Andrey Bogdanov; Takanori Isobe 001; Kyoji Shibutani; Harunaga Hiwatari; Toru Akishita; Francesco Regazzoni 001 (ASIACRYPT (2), 2015)

Midori: A Block Cipher for Low Energy (Extended Version). - Subhadeep Banik; Andrey Bogdanov; Takanori Isobe 001; Kyoji Shibutani; Harunaga Hiwatari; Toru Akishita; Francesco Regazzoni 001 (IACR Cryptol. ePrint Arch., 2015)

Generic Key Recovery Attack on Feistel Scheme. - Takanori Isobe 001; Kyoji Shibutani (IACR Cryptol. ePrint Arch., 2015)

Improved All-Subkeys Recovery Attacks on FOX, KATAN and SHACAL-2 Block Ciphers. - Takanori Isobe 001; Kyoji Shibutani (IACR Cryptol. ePrint Arch., 2015)

New Key Recovery Attacks on Minimal Two-Round Even-Mansour Ciphers. - Takanori Isobe 001; Kyoji Shibutani (IACR Cryptol. ePrint Arch., 2017)

Meet-in-the-Middle Key Recovery Attacks on a Single-Key Two-Round Even-Mansour Cipher. - Takanori Isobe 001; Kyoji Shibutani (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2019)

Key-Recovery Security of Single-Key Even-Mansour Ciphers. - Takanori Isobe 001; Kyoji Shibutani (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2020)

On the (im)possibility of improving the round diffusion of generalized Feistel structures. - Kyoji Shibutani; Tetsu Iwata (Inf. Process. Lett., 2022)