Kosei Sakamoto

60 papers B 1Misc 8Journal 45Unranked 6
YearRankTypeTitle / Venue / Authors
2026 J jnl
BAKSHEESH: Similar Yet Different From GIFT (and ZORRO).
IACR Commun. Cryptol.
Anubhab Baksi, Jakub Breier, Anupam Chattopadhyay, Tomas Gerlich, Sylvain Guilley, Naina Gupta, Takanori Isobe, Arpan Jati, Petr Jedlicka, Hyunjun Kim, Fukang Liu, Zdenek Martinasek, Kosei Sakamoto, Hwajeong Seo, Rentaro Shiba
2025 J jnl
AETHER: An Ultra-High Throughput and Low Energy Authenticated Encryption Scheme.
IACR Trans. Cryptogr. Hardw. Embed. Syst.
Subhadeep Banik, Andrea Caforio, Tatsuya Ishikawa, Takanori Isobe, Mostafizar Rahman, Kosei Sakamoto
2025 Misc conf
Collision Attacks on SPONGENT with Grouping Method.
SAC
Keita Toyama, Kosei Sakamoto, Takanori Isobe
2025 J jnl
Dialga: A Family of Low-Latency Tweakable Block Ciphers Using Multiple Linear Layers.
IACR Trans. Symmetric Cryptol.
Subhadeep Banik, Tatsuya Ishikawa, Takanori Isobe, Ryoma Ito, Kazuhiko Minematsu, Kazuma Nakata, Mostafizar Rahman, Kosei Sakamoto
2025 J jnl
Differential Analysis of Encryption and Finalization Phases of AES-based AEAD Schemes.
J. Inf. Process.
Takuro Shiraya, Kosei Sakamoto, Takanori Isobe
2025 J jnl
Divide-and-Conquer SAT for Exploring Optimal Differential and Linear Characteristics and Its Applications.
IACR Trans. Symmetric Cryptol.
Kazuma Taka, Kosei Sakamoto, Ryoma Ito, Rentaro Shiba, Shion Utsumi, Takanori Isobe
2025 J jnl
Exploring SHA Instructions and Its Application to AES-based Schemes.
IACR Commun. Cryptol.
Takuro Shiraya, Subhadeep Banik, Tatsuya Ishikawa, Ryoma Ito, Mostafizar Rahman, Kosei Sakamoto, Atsushi Tanaka, Shion Utsumi, Takanori Isobe
2025 J jnl
Finding New Differential Characteristics on SPECK Family.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Rikuto Kurahara, Kosei Sakamoto, Takanori Isobe
2025 — conf
Forgery Attacks on SipHash.
ACISP (1)
Kosuke Sasaki, Rikuto Kurahara, Kosei Sakamoto, Takanori Isobe
2025 J jnl
Parallel SAT framework to find clustering of differential characteristics and its applications.
J. Inf. Secur. Appl.
Kosei Sakamoto, Ryoma Ito, Takanori Isobe
2025 J jnl
SAT-Based Differential Analysis of Initialization Phase of AEGIS/Tiaoxin-346/Rocca/Rocca-S.
IEICE Trans. Inf. Syst.
Takuro Shiraya, Kosei Sakamoto, Takanori Isobe
2025 J jnl
Towards Finding Better Differentials on Multiple-Branch-Based Structures with the SAT Method.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Kazuma Taka, Tatsuya Ishikawa, Kosei Sakamoto, Takanori Isobe
2024 — conf
ASURA: An Efficient Large-State Tweakable Block Cipher for ARM Environment.
INDOCRYPT (1)
Atsushi Tanaka, Rentaro Shiba, Kosei Sakamoto, Mostafizar Rahman, Takuro Shiraya, Takanori Isobe
2024 Misc conf
Bit-Wise Analysis for Forgery Attacks on AES-Based AEAD Schemes.
IWSEC
Takuro Shiraya, Kosei Sakamoto, Takanori Isobe
2024 — conf
Collision Attacks on Hashing Modes of Areion.
CANS (2)
Kodai Taiyama, Kosei Sakamoto, Rentaro Shiba, Takanori Isobe
2024 — conf
Differential Distinguishing Attacks on SNOW-V, SNOW-Vi and KCipher-2.
ACISP (1)
Rikuto Kurahara, Kosei Sakamoto, Yuto Nakano, Takanori Isobe
2024 J jnl
Exploring the optimality of byte-wise permutations of a piccolo-type block cipher.
Inf. Process. Lett.
Shion Utsumi, Motoki Nakahashi, Kosei Sakamoto, Takanori Isobe
2024 J jnl
Gleeok: A Family of Low-Latency PRFs and its Applications to Authenticated Encryption.
IACR Trans. Cryptogr. Hardw. Embed. Syst.
Ravi Anand, Subhadeep Banik, Andrea Caforio, Tatsuya Ishikawa, Takanori Isobe, Fukang Liu, Kazuhiko Minematsu, Mostafizar Rahman, Kosei Sakamoto
2024 J jnl
Improving the Security Bounds against Differential Attacks for Pholkos Family.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Nobuyuki Takeuchi, Kosei Sakamoto, Takuro Shiraya, Takanori Isobe
2024 — conf
Key Collisions on AES and Its Applications.
ASIACRYPT (7)
Kodai Taiyama, Kosei Sakamoto, Ryoma Ito, Kazuma Taka, Takanori Isobe
2024 J jnl
Key Collisions on AES and Its Applications.
IACR Cryptol. ePrint Arch.
Kodai Taiyama, Kosei Sakamoto, Ryoma Ito, Kazuma Taka, Takanori Isobe
2024 J jnl
SAT-Based Analysis of Related-Key Impossible Distinguishers on Piccolo and (Tweakable) TWINE.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Shion Utsumi, Kosei Sakamoto, Takanori Isobe
2023 B conf
An Efficient Strategy to Construct a Better Differential on Multiple-Branch-Based Designs: Application to Orthros.
CT-RSA
Kazuma Taka, Tatsuya Ishikawa, Kosei Sakamoto, Takanori Isobe
2023 J jnl
An Efficient Strategy to Construct a Better Differential on Multiple-Branch-Based Designs: Application to Orthros.
IACR Cryptol. ePrint Arch.
Kazuma Taka, Tatsuya Ishikawa, Kosei Sakamoto, Takanori Isobe
2023 — conf
An Ultra-High Throughput AES-Based Authenticated Encryption Scheme for 6G: Design and Implementation.
ESORICS (1)
Ravi Anand, Subhadeep Banik, Andrea Caforio, Kazuhide Fukushima, Takanori Isobe, Shinsaku Kiyomoto, Fukang Liu, Yuto Nakano, Kosei Sakamoto, Nobuyuki Takeuchi
2023 J jnl
Areion: Highly-Efficient Permutations and Its Applications (Extended Version).
IACR Cryptol. ePrint Arch.
Takanori Isobe, Ryoma Ito, Fukang Liu, Kazuhiko Minematsu, Motoki Nakahashi, Kosei Sakamoto, Rentaro Shiba
2023 J jnl
Areion: Highly-Efficient Permutations and Its Applications to Hash Functions for Short Input.
IACR Trans. Cryptogr. Hardw. Embed. Syst.
Takanori Isobe, Ryoma Ito, Fukang Liu, Kazuhiko Minematsu, Motoki Nakahashi, Kosei Sakamoto, Rentaro Shiba
2023 J jnl
BAKSHEESH: Similar Yet Different From GIFT.
IACR Cryptol. ePrint Arch.
Anubhab Baksi, Jakub Breier, Anupam Chattopadhyay, Tomas Gerlich, Sylvain Guilley, Naina Gupta, Kai Hu, Takanori Isobe, Arpan Jati, Petr Jedlicka, Hyunjun Kim, Fukang Liu, Zdenek Martinasek, Kosei Sakamoto, Hwajeong Seo, Rentaro Shiba, Ritu Ranjan Shrivastwa
2023 J jnl
Bit-level evaluation of piccolo block cipher by satisfiability problem solver.
IET Inf. Secur.
Shion Utsumi, Kosei Sakamoto, Takanori Isobe
2023 Misc conf
Ghidle: Efficient Large-State Block Ciphers for Post-quantum Security.
ACISP
Motoki Nakahashi, Rentaro Shiba, Ravi Anand, Mostafizar Rahman, Kosei Sakamoto, Fukang Liu, Takanori Isobe
2023 J jnl
MILP-based security evaluation for AEGIS/Tiaoxin-346/Rocca.
IET Inf. Secur.
Takuro Shiraya, Nobuyuki Takeuchi, Kosei Sakamoto, Takanori Isobe
2023 J jnl
On Optimality of the Round Function of Rocca.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Nobuyuki Takeuchi, Kosei Sakamoto, Takanori Isobe
2023 Misc conf
Parallel SAT Framework to Find Clustering of Differential Characteristics and Its Applications.
SAC
Kosei Sakamoto, Ryoma Ito, Takanori Isobe
2023 J jnl
Parallel SAT Framework to Find Clustering of Differential Characteristics and Its Applications.
IACR Cryptol. ePrint Arch.
Kosei Sakamoto, Ryoma Ito, Takanori Isobe
2023 J jnl
Security Evaluation of Initialization Phases and Round Functions of Rocca and AEGIS.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Nobuyuki Takeuchi, Kosei Sakamoto, Takanori Isobe
2022 J jnl
Applying Byte-Shuffling to CLEFIA-Type Structure.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Kazuto Shimizu, Kosei Sakamoto, Takanori Isobe
2022 J jnl
Design of a Linear Layer for a Block Cipher Based on Type-2 Generalized Feistel Network with 32 Branches.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Kosei Sakamoto, Kazuhiko Minematsu, Nao Shibata, Maki Shigeri, Hiroyasu Kubo, Takanori Isobe
2022 J jnl
Distinguishing and key recovery attacks on the reduced-round SNOW-V and SNOW-Vi.
J. Inf. Secur. Appl.
Jin Hoki, Takanori Isobe, Ryoma Ito, Fukang Liu, Kosei Sakamoto
2022 J jnl
Efficient constructions for large-state block ciphers based on AES New Instructions.
IET Inf. Secur.
Rentaro Shiba, Kosei Sakamoto, Takanori Isobe
2022 J jnl
Integral and impossible-differential attacks on the reduced-round Lesamnta-LW-BC.
IET Inf. Secur.
Rentaro Shiba, Kosei Sakamoto, Fukang Liu, Kazuhiko Minematsu, Takanori Isobe
2022 J jnl
Rocca: An Efficient AES-based Encryption Scheme for Beyond 5G (Full version).
IACR Cryptol. ePrint Arch.
Kosei Sakamoto, Fukang Liu, Yuto Nakano, Shinsaku Kiyomoto, Takanori Isobe
2021 J jnl
Atom: A Stream Cipher with Double Key Filter.
IACR Cryptol. ePrint Arch.
Subhadeep Banik, Andrea Caforio, Takanori Isobe, Fukang Liu, Willi Meier, Kosei Sakamoto, Santanu Sarkar
2021 J jnl
Atom: A Stream Cipher with Double Key Filter.
IACR Trans. Symmetric Cryptol.
Subhadeep Banik, Andrea Caforio, Takanori Isobe, Fukang Liu, Willi Meier, Kosei Sakamoto, Santanu Sarkar
2021 J jnl
Bit-wise Cryptanalysis on AND-RX Permutation Friet-PC.
IACR Cryptol. ePrint Arch.
Ryoma Ito, Rentaro Shiba, Kosei Sakamoto, Fukang Liu, Takanori Isobe
2021 J jnl
Bit-wise cryptanalysis on AND-RX permutation Friet-PC.
J. Inf. Secur. Appl.
Ryoma Ito, Rentaro Shiba, Kosei Sakamoto, Fukang Liu, Takanori Isobe
2021 Misc conf
Distinguishing and Key Recovery Attacks on the Reduced-Round SNOW-V.
ACISP
Jin Hoki, Takanori Isobe, Ryoma Ito, Fukang Liu, Kosei Sakamoto
2021 J jnl
Distinguishing and Key Recovery Attacks on the Reduced-Round SNOW-V.
IACR Cryptol. ePrint Arch.
Jin Hoki, Takanori Isobe, Ryoma Ito, Fukang Liu, Kosei Sakamoto
2021 J jnl
MILP-Aided Security Evaluation of Differential Attacks on KCipher-2.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Jin Hoki, Kosei Sakamoto, Fukang Liu, Kazuhiko Minematsu, Takanori Isobe
2021 J jnl
Orthros: A Low-Latency PRF.
IACR Cryptol. ePrint Arch.
Subhadeep Banik, Takanori Isobe, Fukang Liu, Kazuhiko Minematsu, Kosei Sakamoto
2021 J jnl
Orthros: A Low-Latency PRF.
IACR Trans. Symmetric Cryptol.
Subhadeep Banik, Takanori Isobe, Fukang Liu, Kazuhiko Minematsu, Kosei Sakamoto
2021 J jnl
Practical Integral Distinguishers on SNOW 3G and KCipher-2.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Jin Hoki, Kosei Sakamoto, Kazuhiko Minematsu, Takanori Isobe
2021 J jnl
Rocca: An Efficient AES-based Encryption Scheme for Beyond 5G.
IACR Trans. Symmetric Cryptol.
Kosei Sakamoto, Fukang Liu, Yuto Nakano, Shinsaku Kiyomoto, Takanori Isobe
2021 J jnl
Weak Keys in Reduced AEGIS and Tiaoxin.
IACR Cryptol. ePrint Arch.
Fukang Liu, Takanori Isobe, Willi Meier, Kosei Sakamoto
2021 J jnl
Weak Keys in Reduced AEGIS and Tiaoxin.
IACR Trans. Symmetric Cryptol.
Fukang Liu, Takanori Isobe, Willi Meier, Kosei Sakamoto
2020 Misc conf
Galaxy: A Family of Stream-Cipher-Based Space-Hard Ciphers.
ACISP
Yuji Koike, Kosei Sakamoto, Takuya Hayashi, Takanori Isobe
2020 J jnl
Security of Related-Key Differential Attacks on TWINE, Revisited.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Kosei Sakamoto, Kazuhiko Minematsu, Nao Shibata, Maki Shigeri, Hiroyasu Kubo, Yuki Funabiki, Takanori Isobe
2020 J jnl
Tweakable TWINE: Building a Tweakable Block Cipher on Generalized Feistel Structure.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Kosei Sakamoto, Kazuhiko Minematsu, Nao Shibata, Maki Shigeri, Hiroyasu Kubo, Yuki Funabiki, Andrey Bogdanov, Sumio Morioka, Takanori Isobe
2020 Misc conf
WARP : Revisiting GFN for Lightweight 128-Bit Block Cipher.
SAC
Subhadeep Banik, Zhenzhen Bao, Takanori Isobe, Hiroyasu Kubo, Fukang Liu, Kazuhiko Minematsu, Kosei Sakamoto, Nao Shibata, Maki Shigeri
2020 J jnl
WARP : Revisiting GFN for Lightweight 128-bit Block Cipher.
IACR Cryptol. ePrint Arch.
Subhadeep Banik, Zhenzhen Bao, Takanori Isobe, Hiroyasu Kubo, Fukang Liu, Kazuhiko Minematsu, Kosei Sakamoto, Nao Shibata, Maki Shigeri
2019 Misc conf
Tweakable TWINE: Building a Tweakable Block Cipher on Generalized Feistel Structure.
IWSEC
Kosei Sakamoto, Kazuhiko Minematsu, Nao Shibata, Maki Shigeri, Hiroyasu Kubo, Yuki Funabiki, Andrey Bogdanov, Sumio Morioka, Takanori Isobe