Kosei Sakamoto

According to our database, Kosei Sakamoto authored at least 45 papers between 2019 and 2025.

Collaborative distances:

• Dijkstra number of four.
• Erdős number of four.

2025

Divide-and-Conquer SAT for Exploring Optimal Differential and Linear Characteristics and Its Applications.

Kazuma Taka, Kosei Sakamoto, Ryoma Ito, Rentaro Shiba, Shion Utsumi, Takanori Isobe

IACR Trans. Symmetric Cryptol., 2025

AETHER: An Ultra-High Throughput and Low Energy Authenticated Encryption Scheme.

Subhadeep Banik, Andrea Caforio, Tatsuya Ishikawa, Takanori Isobe, Mostafizar Rahman, Kosei Sakamoto

IACR Trans. Cryptogr. Hardw. Embed. Syst., 2025

Differential Analysis of Encryption and Finalization Phases of AES-based AEAD Schemes.

Takuro Shiraya, Kosei Sakamoto, Takanori Isobe

J. Inf. Process., 2025

Towards Finding Better Differentials on Multiple-Branch-Based Structures with the SAT Method.

Kazuma Taka, Tatsuya Ishikawa, Kosei Sakamoto, Takanori Isobe

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2025

Finding New Differential Characteristics on SPECK Family.

Rikuto Kurahara, Kosei Sakamoto, Takanori Isobe

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2025

Exploring SHA Instructions and Its Application to AES-based Schemes.

Takuro Shiraya, Subhadeep Banik, Tatsuya Ishikawa, Ryoma Ito, Mostafizar Rahman, Kosei Sakamoto, Atsushi Tanaka, Shion Utsumi, Takanori Isobe

IACR Commun. Cryptol., 2025

Forgery Attacks on SipHash.

Kosuke Sasaki, Rikuto Kurahara, Kosei Sakamoto, Takanori Isobe

Proceedings of the Information Security and Privacy - 30th Australasian Conference, 2025

2024

Exploring the optimality of byte-wise permutations of a piccolo-type block cipher.

Shion Utsumi, Motoki Nakahashi, Kosei Sakamoto, Takanori Isobe

Inf. Process. Lett., February, 2024

Gleeok: A Family of Low-Latency PRFs and its Applications to Authenticated Encryption.

Ravi Anand, Subhadeep Banik, Andrea Caforio, Tatsuya Ishikawa, Takanori Isobe, Fukang Liu, Kazuhiko Minematsu, Mostafizar Rahman, Kosei Sakamoto

IACR Trans. Cryptogr. Hardw. Embed. Syst., 2024

SAT-Based Analysis of Related-Key Impossible Distinguishers on Piccolo and (Tweakable) TWINE.

Shion Utsumi, Kosei Sakamoto, Takanori Isobe

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2024

Improving the Security Bounds against Differential Attacks for Pholkos Family.

Nobuyuki Takeuchi, Kosei Sakamoto, Takuro Shiraya, Takanori Isobe

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2024

Bit-Wise Analysis for Forgery Attacks on AES-Based AEAD Schemes.

Takuro Shiraya, Kosei Sakamoto, Takanori Isobe

Proceedings of the Advances in Information and Computer Security, 2024

ASURA: An Efficient Large-State Tweakable Block Cipher for ARM Environment.

Atsushi Tanaka, Rentaro Shiba, Kosei Sakamoto, Mostafizar Rahman, Takuro Shiraya, Takanori Isobe

Proceedings of the Progress in Cryptology - INDOCRYPT 2024, 2024

Collision Attacks on Hashing Modes of Areion.

Kodai Taiyama, Kosei Sakamoto, Rentaro Shiba, Takanori Isobe

Proceedings of the Cryptology and Network Security - 23rd International Conference, 2024

Key Collisions on AES and Its Applications.

Kodai Taiyama, Kosei Sakamoto, Ryoma Ito, Kazuma Taka, Takanori Isobe

Proceedings of the Advances in Cryptology - ASIACRYPT 2024, 2024

Differential Distinguishing Attacks on SNOW-V, SNOW-Vi and KCipher-2.

Rikuto Kurahara, Kosei Sakamoto, Yuto Nakano, Takanori Isobe

Proceedings of the Information Security and Privacy - 29th Australasian Conference, 2024

2023

Bit-level evaluation of piccolo block cipher by satisfiability problem solver.

Shion Utsumi, Kosei Sakamoto, Takanori Isobe

IET Inf. Secur., July, 2023

MILP-based security evaluation for AEGIS/Tiaoxin-346/Rocca.

Takuro Shiraya, Nobuyuki Takeuchi, Kosei Sakamoto, Takanori Isobe

IET Inf. Secur., May, 2023

Security Evaluation of Initialization Phases and Round Functions of Rocca and AEGIS.

Nobuyuki Takeuchi, Kosei Sakamoto, Takanori Isobe

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., March, 2023

Areion: Highly-Efficient Permutations and Its Applications to Hash Functions for Short Input.

Takanori Isobe, Ryoma Ito, Fukang Liu, Kazuhiko Minematsu, Motoki Nakahashi, Kosei Sakamoto, Rentaro Shiba

IACR Trans. Cryptogr. Hardw. Embed. Syst., 2023

On Optimality of the Round Function of Rocca.

Nobuyuki Takeuchi, Kosei Sakamoto, Takanori Isobe

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2023

Areion: Highly-Efficient Permutations and Its Applications (Extended Version).

Takanori Isobe, Ryoma Ito, Fukang Liu, Kazuhiko Minematsu, Motoki Nakahashi, Kosei Sakamoto, Rentaro Shiba

IACR Cryptol. ePrint Arch., 2023

BAKSHEESH: Similar Yet Different From GIFT.

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

IACR Cryptol. ePrint Arch., 2023

Parallel SAT Framework to Find Clustering of Differential Characteristics and Its Applications.

Kosei Sakamoto, Ryoma Ito, Takanori Isobe

Proceedings of the Selected Areas in Cryptography - SAC 2023, 2023

An Ultra-High Throughput AES-Based Authenticated Encryption Scheme for 6G: Design and Implementation.

Ravi Anand, Subhadeep Banik, Andrea Caforio, Kazuhide Fukushima, Takanori Isobe, Shinsaku Kiyomoto, Fukang Liu, Yuto Nakano, Kosei Sakamoto, Nobuyuki Takeuchi

Proceedings of the Computer Security - ESORICS 2023, 2023

An Efficient Strategy to Construct a Better Differential on Multiple-Branch-Based Designs: Application to Orthros.

Kazuma Taka, Tatsuya Ishikawa, Kosei Sakamoto, Takanori Isobe

Proceedings of the Topics in Cryptology - CT-RSA 2023, 2023

Ghidle: Efficient Large-State Block Ciphers for Post-quantum Security.

Motoki Nakahashi, Rentaro Shiba, Ravi Anand, Mostafizar Rahman, Kosei Sakamoto, Fukang Liu, Takanori Isobe

Proceedings of the Information Security and Privacy - 28th Australasian Conference, 2023

2022

Distinguishing and key recovery attacks on the reduced-round SNOW-V and SNOW-Vi.

Jin Hoki, Takanori Isobe, Ryoma Ito, Fukang Liu, Kosei Sakamoto

J. Inf. Secur. Appl., 2022

Integral and impossible-differential attacks on the reduced-round Lesamnta-LW-BC.

Rentaro Shiba, Kosei Sakamoto, Fukang Liu, Kazuhiko Minematsu, Takanori Isobe

IET Inf. Secur., 2022

Efficient constructions for large-state block ciphers based on AES New Instructions.

Rentaro Shiba, Kosei Sakamoto, Takanori Isobe

IET Inf. Secur., 2022

Applying Byte-Shuffling to CLEFIA-Type Structure.

Kazuto Shimizu, Kosei Sakamoto, Takanori Isobe

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2022

Design of a Linear Layer for a Block Cipher Based on Type-2 Generalized Feistel Network with 32 Branches.

Kosei Sakamoto, Kazuhiko Minematsu, Nao Shibata, Maki Shigeri, Hiroyasu Kubo, Takanori Isobe

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2022

Rocca: An Efficient AES-based Encryption Scheme for Beyond 5G (Full version).

Kosei Sakamoto, Fukang Liu, Yuto Nakano, Shinsaku Kiyomoto, Takanori Isobe

IACR Cryptol. ePrint Arch., 2022

2021

Rocca: An Efficient AES-based Encryption Scheme for Beyond 5G.

Kosei Sakamoto, Fukang Liu, Yuto Nakano, Shinsaku Kiyomoto, Takanori Isobe

IACR Trans. Symmetric Cryptol., 2021

Bit-wise cryptanalysis on AND-RX permutation Friet-PC.

Ryoma Ito, Rentaro Shiba, Kosei Sakamoto, Fukang Liu, Takanori Isobe

J. Inf. Secur. Appl., 2021

Practical Integral Distinguishers on SNOW 3G and KCipher-2.

Jin Hoki, Kosei Sakamoto, Kazuhiko Minematsu, Takanori Isobe

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2021

MILP-Aided Security Evaluation of Differential Attacks on KCipher-2.

Jin Hoki, Kosei Sakamoto, Fukang Liu, Kazuhiko Minematsu, Takanori Isobe

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2021

Weak Keys in Reduced AEGIS and Tiaoxin.

Fukang Liu, Takanori Isobe, Willi Meier, Kosei Sakamoto

IACR Cryptol. ePrint Arch., 2021

Atom: A Stream Cipher with Double Key Filter.

Subhadeep Banik, Andrea Caforio, Takanori Isobe, Fukang Liu, Willi Meier, Kosei Sakamoto, Santanu Sarkar

IACR Cryptol. ePrint Arch., 2021

Orthros: A Low-Latency PRF.

Subhadeep Banik, Takanori Isobe, Fukang Liu, Kazuhiko Minematsu, Kosei Sakamoto

IACR Cryptol. ePrint Arch., 2021

Distinguishing and Key Recovery Attacks on the Reduced-Round SNOW-V.

Jin Hoki, Takanori Isobe, Ryoma Ito, Fukang Liu, Kosei Sakamoto

Proceedings of the Information Security and Privacy - 26th Australasian Conference, 2021

2020

Security of Related-Key Differential Attacks on TWINE, Revisited.

Kosei Sakamoto, Kazuhiko Minematsu, Nao Shibata, Maki Shigeri, Hiroyasu Kubo, Yuki Funabiki, Takanori Isobe

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2020

WARP : Revisiting GFN for Lightweight 128-Bit Block Cipher.

Subhadeep Banik, Zhenzhen Bao, Takanori Isobe, Hiroyasu Kubo, Fukang Liu, Kazuhiko Minematsu, Kosei Sakamoto, Nao Shibata, Maki Shigeri

Proceedings of the Selected Areas in Cryptography - SAC 2020, 2020

Galaxy: A Family of Stream-Cipher-Based Space-Hard Ciphers.

Yuji Koike, Kosei Sakamoto, Takuya Hayashi, Takanori Isobe

Proceedings of the Information Security and Privacy - 25th Australasian Conference, 2020

2019

Tweakable TWINE: Building a Tweakable Block Cipher on Generalized Feistel Structure.

Kosei Sakamoto, Kazuhiko Minematsu, Nao Shibata, Maki Shigeri, Hiroyasu Kubo, Yuki Funabiki, Andrey Bogdanov, Sumio Morioka, Takanori Isobe

Proceedings of the Advances in Information and Computer Security, 2019