Takanori Isobe

According to our database, Takanori Isobe authored at least 137 papers between 2009 and 2024.

Collaborative distances:

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

2024

Analysis of Atom against quantum attacks.

Ravi Anand, Rimpa Nandi, Takanori Isobe

IET Quantum Commun., March, 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

Key Committing Attacks against AES-based AEAD Schemes.

Patrick Derbez, Pierre-Alain Fouque, Takanori Isobe, Mostafizar Rahman, André Schrottenloher

IACR Trans. Symmetric Cryptol., 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

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

Quantum security analysis of Rocca.

Ravi Anand, Takanori Isobe

Quantum Inf. Process., April, 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

mPoW: How to Make Proof of Work Meaningful.

Takaki Asanuma, Takanori Isobe

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

Cubicle: A family of space-hard ciphers for IoT.

Rentaro Shiba, Ravi Anand, Kazuhiko Minematsu, Takanori Isobe

IET Inf. Secur., January, 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

A Deeper Look into Deep Learning-based Output Prediction Attacks Using Weak SPN Block Ciphers.

Hayato Kimura, Keita Emura, Takanori Isobe, Ryoma Ito, Kazuto Ogawa, Toshihiro Ohigashi

J. Inf. Process., 2023

Cryptanalysis on End-to-End Encryption Schemes of Communication Tools and Its Research Trend.

Takanori Isobe, Ryoma Ito, Kazuhiko Minematsu

J. Inf. Process., 2023

Even-Mansour Space-hard Cipher: White-box Cryptography Cipher Meets Physically Unclonable Function.

Takaki Asanuma, Takanori Isobe

J. Inf. Process., 2023

On Optimality of the Round Function of Rocca.

Nobuyuki Takeuchi, Kosei Sakamoto, Takanori Isobe

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

Revisiting the Boomerang Attack from a Perspective of 3-differential.

Libo Wang, Ling Song, Baofeng Wu, Mostafizar Rahman, Takanori Isobe

IACR Cryptol. ePrint Arch., 2023

Finding Desirable Substitution Box with SASQUATCH.

Manas Wadhwa, Anubhab Baksi, Kai Hu, Anupam Chattopadhyay, Takanori Isobe, Dhiman Saha

IACR Cryptol. ePrint Arch., 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

IACR Cryptol. ePrint Arch., 2023

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

Kosei Sakamoto, Ryoma Ito, Takanori Isobe

IACR Cryptol. ePrint Arch., 2023

Analysis of RIPEMD-160: New Collision Attacks and Finding Characteristics with MILP.

Fukang Liu, Gaoli Wang, Santanu Sarkar, Ravi Anand, Willi Meier, Yingxin Li, Takanori Isobe

IACR Cryptol. ePrint Arch., 2023

Coefficient Grouping for Complex Affine Layers.

Fukang Liu, Lorenzo Grassi, Clémence Bouvier, Willi Meier, Takanori Isobe

IACR Cryptol. ePrint Arch., 2023

Key Committing Security Analysis of AEGIS.

Takanori Isobe, Mostafizar Rahman

IACR Cryptol. ePrint Arch., 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

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

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

Hybrid Code Lifting on Space-Hard Block Ciphers Application to Yoroi and SPNbox.

Yosuke Todo, Takanori Isobe

IACR Trans. Symmetric Cryptol., 2022

New Cryptanalysis of ZUC-256 Initialization Using Modular Differences.

Fukang Liu, Willi Meier, Santanu Sarkar, Gaoli Wang, Ryoma Ito, Takanori Isobe

IACR Trans. Symmetric Cryptol., 2022

The Inverse of χ and Its Applications to Rasta-Like Ciphers.

Fukang Liu, Santanu Sarkar, Willi Meier, Takanori Isobe

J. Cryptol., 2022

A Proof of Work based on Preimage Problem of Variants of SHA-3 with ASIC Resistance.

Takaki Asanuma, Takanori Isobe

J. Inf. Process., 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

A Proof of Work Based on Key Recovery Problem of Cascade Block Ciphers with ASIC Resistance.

Takaki Asanuma, Takanori Isobe

IEICE Trans. Inf. Syst., 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

Algebraic Meet-in-the-Middle Attack on LowMC.

Fukang Liu, Gaoli Wang, Willi Meier, Santanu Sarkar, Takanori Isobe

IACR Cryptol. ePrint Arch., 2022

New Low-Memory Algebraic Attacks on LowMC in the Picnic Setting.

Fukang Liu, Willi Meier, Santanu Sarkar, Takanori Isobe

IACR Cryptol. ePrint Arch., 2022

Coefficient Grouping: Breaking Chaghri and More.

Fukang Liu, Ravi Anand, Libo Wang, Willi Meier, Takanori Isobe

IACR Cryptol. ePrint Arch., 2022

A Modular Approach to the Incompressibility of Block-Cipher-Based AEADs.

Akinori Hosoyamada, Takanori Isobe, Yosuke Todo, Kan Yasuda

IACR Cryptol. ePrint Arch., 2022

Big Brother Is Watching You: A Closer Look At Backdoor Construction.

Anubhab Baksi, Arghya Bhattacharjee, Jakub Breier, Takanori Isobe, Mridul Nandi

IACR Cryptol. ePrint Arch., 2022

Output Prediction Attacks on Block Ciphers Using Deep Learning.

Hayato Kimura, Keita Emura, Takanori Isobe, Ryoma Ito, Kazuto Ogawa, Toshihiro Ohigashi

Proceedings of the Applied Cryptography and Network Security Workshops, 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

Exploiting Weak Diffusion of Gimli: Improved Distinguishers and Preimage Attacks.

Fukang Liu, Takanori Isobe, Willi Meier

IACR Trans. Symmetric Cryptol., 2021

Yoroi: Updatable Whitebox Cryptography.

Yuji Koike, Takanori Isobe

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

Virtual Vault: A Practical Leakage Resilient Scheme Using Space-Hard Ciphers.

Yuji Koike, Takuya Hayashi, Jun Kurihara, Takanori Isobe

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

Further Results on Efficient Implementations of Block Cipher Linear Layers.

Subhadeep Banik, Yuki Funabiki, Takanori Isobe

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

Finding Practical Distinguishers for ZUC-256 Using Modular Differences.

Fukang Liu, Willi Meier, Santanu Sarkar, Gaoli Wang, Ryoma Ito, Takanori Isobe

IACR Cryptol. ePrint Arch., 2021

Weak Keys in Reduced AEGIS and Tiaoxin.

Fukang Liu, Takanori Isobe, Willi Meier, Kosei Sakamoto

IACR Cryptol. ePrint Arch., 2021

Algebraic Attacks on Rasta and Dasta Using Low-Degree Equations.

Fukang Liu, Takanori Isobe, Willi Meier

IACR Cryptol. ePrint Arch., 2021

A Simple Algebraic Attack on 3-Round LowMC.

Fukang Liu, Takanori Isobe, Willi Meier

IACR Cryptol. ePrint Arch., 2021

Security Analysis of SFrame.

Takanori Isobe, Ryoma Ito, Kazuhiko Minematsu

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

IACR Cryptol. ePrint Arch., 2021

Perfect Trees: Designing Energy-Optimal Symmetric Encryption Primitives.

Andrea Caforio, Subhadeep Banik, Yosuke Todo, Willi Meier, Takanori Isobe, Fukang Liu, Bin Zhang

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

Three Input Exclusive-OR Gate Support For Boyar-Peralta's Algorithm (Extended Version).

Anubhab Baksi, Vishnu Asutosh Dasu, Banashri Karmakar, Anupam Chattopadhyay, Takanori Isobe

IACR Cryptol. ePrint Arch., 2021

Output Prediction Attacks on SPN Block Ciphers using Deep Learning.

Hayato Kimura, Keita Emura, Takanori Isobe, Ryoma Ito, Kazuto Ogawa, Toshihiro Ohigashi

IACR Cryptol. ePrint Arch., 2021

Security Analysis of End-to-End Encryption for Zoom Meetings.

Takanori Isobe, Ryoma Ito

IEEE Access, 2021

Three Input Exclusive-OR Gate Support for Boyar-Peralta's Algorithm.

Anubhab Baksi, Vishnu Asutosh Dasu, Banashri Karmakar, Anupam Chattopadhyay, Takanori Isobe

Proceedings of the Progress in Cryptology - INDOCRYPT 2021, 2021

Differential Fault Attack on Rocca.

Ravi Anand, Takanori Isobe

Proceedings of the Information Security and Cryptology - ICISC 2021, 2021

Algebraic Attacks on Rasta and Dasta Using Low-Degree Equations.

Fukang Liu, Santanu Sarkar, Willi Meier, Takanori Isobe

Proceedings of the Advances in Cryptology - ASIACRYPT 2021, 2021

Algebraic Attacks on Round-Reduced Keccak.

Fukang Liu, Takanori Isobe, Willi Meier, Zhonghao Yang

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

2020

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

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

Preimage Attacks on Reduced Troika with Divide-and-Conquer Methods.

Fukang Liu, Takanori Isobe

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

Key-Recovery Security of Single-Key Even-Mansour Ciphers.

Takanori Isobe, Kyoji Shibutani

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

Security Analysis and Countermeasures of an End-to-End Encryption Scheme of LINE.

Takanori Isobe, Kazuhiko Minematsu

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

Algebraic Attacks on Round-Reduced Keccak/Xoodoo.

Fukang Liu, Takanori Isobe, Willi Meier, Zhonghao Yang

IACR Cryptol. ePrint Arch., 2020

Cryptanalysis of Full LowMC and LowMC-M with Algebraic Techniques.

Fukang Liu, Takanori Isobe, Willi Meier

IACR Cryptol. ePrint Arch., 2020

Automatic Verification of Differential Characteristics: Application to Reduced Gimli.

Fukang Liu, Takanori Isobe, Willi Meier

IACR Cryptol. ePrint Arch., 2020

Exploiting Weak Diffusion of Gimli: A Full-Round Distinguisher and Reduced-Round Preimage Attacks.

Fukang Liu, Takanori Isobe, Willi Meier

IACR Cryptol. ePrint Arch., 2020

ACE in Chains : How Risky is CBC Encryption of Binary Executable Files ?

Rintaro Fujita, Takanori Isobe, Kazuhiko Minematsu

IACR Cryptol. ePrint Arch., 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

IACR Cryptol. ePrint Arch., 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

Cube-Based Cryptanalysis of Subterranean-SAE.

Fukang Liu, Takanori Isobe, Willi Meier

IACR Trans. Symmetric Cryptol., 2019

Improved Division Property Based Cube Attacks Exploiting Algebraic Properties of Superpoly.

Yonglin Hao, Takanori Isobe, Lin Jiao, Chaoyun Li, Willi Meier, Yosuke Todo, Qingju Wang

IEEE Trans. Computers, 2019

Meet-in-the-Middle Key Recovery Attacks on a Single-Key Two-Round Even-Mansour Cipher.

Takanori Isobe, Kyoji Shibutani

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2019

Improved Integral Attack on HIGHT.

Yuki Funabiki, Yosuke Todo, Takanori Isobe, Masakatu Morii

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2019

Preimages and Collisions for Up to 5-Round Gimli-Hash Using Divide-and-Conquer Methods.

Fukang Liu, Takanori Isobe, Willi Meier

IACR Cryptol. ePrint Arch., 2019

Cryptanalysis of Subterranean-SAE.

Fukang Liu, Takanori Isobe, Willi Meier

IACR Cryptol. ePrint Arch., 2019

Iterative Differential Characteristic of TRIFLE-BC.

Fukang Liu, Takanori Isobe

IACR Cryptol. ePrint Arch., 2019

New Semi-Free-Start Collision Attack Framework for Reduced RIPEMD-160.

Fukang Liu, Christoph Dobraunig, Florian Mendel, Takanori Isobe, Gaoli Wang, Zhenfu Cao

IACR Cryptol. ePrint Arch., 2019

Plaintext Recovery Attacks against XTS Beyond Collisions.

Takanori Isobe, Kazuhiko Minematsu

IACR Cryptol. ePrint Arch., 2019

More results on Shortest Linear Programs.

Subhadeep Banik, Yuki Funabiki, Takanori Isobe

IACR Cryptol. ePrint Arch., 2019

Cryptanalysis of Plantlet.

Subhadeep Banik, Khashayar Barooti, Takanori Isobe

IACR Cryptol. ePrint Arch., 2019

Neural-Network-Based Pseudo-Random Number Generator Evaluation Tool for Stream Ciphers.

Hayato Kimura, Takanori Isobe, Toshihiro Ohigashi

Proceedings of the Seventh International Symposium on Computing and Networking Workshops, 2019

Efficient Collision Attack Frameworks for RIPEMD-160.

Fukang Liu, Christoph Dobraunig, Florian Mendel, Takanori Isobe, Gaoli Wang, Zhenfu Cao

Proceedings of the Advances in Cryptology - CRYPTO 2019, 2019

2018

Towards Low Energy Stream Ciphers.

Subhadeep Banik, Vasily Mikhalev, Frederik Armknecht, Takanori Isobe, Willi Meier, Andrey Bogdanov, Yuhei Watanabe, Francesco Regazzoni

IACR Trans. Symmetric Cryptol., 2018

ShiftRows Alternatives for AES-like Ciphers and Optimal Cell Permutations for Midori and Skinny.

Gianira N. Alfarano, Christof Beierle, Takanori Isobe, Stefan Kölbl, Gregor Leander

IACR Trans. Symmetric Cryptol., 2018

Cube Attacks on Non-Blackbox Polynomials Based on Division Property.

Yosuke Todo, Takanori Isobe, Yonglin Hao, Willi Meier

IEEE Trans. Computers, 2018

Cryptanalysis of Reduced Kreyvium.

Yuhei Watanabe, Takanori Isobe, Masakatu Morii

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2018

Theoretical Understanding of Some Conditional and Joint Biases in RC4 Stream Cipher.

Sonu Jha, Subhadeep Banik, Takanori Isobe, Toshihiro Ohigashi, Santanu Sarkar

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2018

On Design of Robust Lightweight Stream Cipher with Short Internal State.

Subhadeep Banik, Takanori Isobe, Masakatu Morii

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2018

Fast Correlation Attack Revisited -Cryptanalysis on Full Grain-128a, Grain-128, and Grain-v1.

Yosuke Todo, Takanori Isobe, Willi Meier, Kazumaro Aoki, Bin Zhang

IACR Cryptol. ePrint Arch., 2018

Breaking Message Integrity of an End-to-End Encryption Scheme of LINE.

Takanori Isobe, Kazuhiko Minematsu

IACR Cryptol. ePrint Arch., 2018

Inverse gating for low energy encryption.

Subhadeep Banik, Andrey Bogdanov, Francesco Regazzoni, Takanori Isobe, Harunaga Hiwatari, Toru Akishita

Proceedings of the 2018 IEEE International Symposium on Hardware Oriented Security and Trust, 2018

Several MILP-Aided Attacks Against SNOW 2.0.

Yuki Funabiki, Yosuke Todo, Takanori Isobe, Masakatu Morii

Proceedings of the Cryptology and Network Security - 17th International Conference, 2018

2017

Some cryptanalytic results on Lizard.

Subhadeep Banik, Takanori Isobe, Tingting Cui, Jian Guo

IACR Trans. Symmetric Cryptol., 2017

How to Efficiently Exploit Different Types of Biases for Plaintext Recovery of RC4.

Yuhei Watanabe, Takanori Isobe, Toshihiro Ohigashi, Masakatu Morii

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2017

Analysis and Improvements of the Full Spritz Stream Cipher.

Subhadeep Banik, Takanori Isobe, Masakatu Morii

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2017

Improved Division Property Based Cube Attacks Exploiting Algebraic Properties of Superpoly.

Qingju Wang, Yonglin Hao, Yosuke Todo, Chaoyun Li, Takanori Isobe, Willi Meier

IACR Cryptol. ePrint Arch., 2017

New Key Recovery Attacks on Minimal Two-Round Even-Mansour Ciphers.

Takanori Isobe, Kyoji Shibutani

IACR Cryptol. ePrint Arch., 2017

Some cryptanalytic results on Lizard.

Subhadeep Banik, Takanori Isobe

IACR Cryptol. ePrint Arch., 2017

Analysis of Software Countermeasures for Whitebox Encryption.

Subhadeep Banik, Andrey Bogdanov, Takanori Isobe, Martin Bjerregaard Jepsen

IACR Cryptol. ePrint Arch., 2017

Low-Data Complexity Attacks on Camellia.

Takeru Koie, Takanori Isobe, Yosuke Todo, Masakatu Morii

Proceedings of the Applications and Techniques in Information Security, 2017

Conditional Differential Cryptanalysis for Kreyvium.

Yuhei Watanabe, Takanori Isobe, Masakatu Morii

Proceedings of the Information Security and Privacy - 22nd Australasian Conference, 2017

2016

Cryptanalysis of the Full Spritz Stream Cipher.

Subhadeep Banik, Takanori Isobe

IACR Cryptol. ePrint Arch., 2016

Some Proofs of Joint Distributions of Keystream Biases in RC4.

Sonu Jha, Subhadeep Banik, Takanori Isobe, Toshihiro Ohigashi

Proceedings of the Progress in Cryptology - INDOCRYPT 2016, 2016

Round gating for low energy block ciphers.

Subhadeep Banik, Andrey Bogdanov, Francesco Regazzoni, Takanori Isobe, Harunaga Hiwatari, Toru Akishita

Proceedings of the 2016 IEEE International Symposium on Hardware Oriented Security and Trust, 2016

Towards Practical Whitebox Cryptography: Optimizing Efficiency and Space Hardness.

Andrey Bogdanov, Takanori Isobe, Elmar Tischhauser

Proceedings of the Advances in Cryptology - ASIACRYPT 2016, 2016

2015

Full Plaintext Recovery Attacks on RC4 Using Multiple Biases.

Toshihiro Ohigashi, Takanori Isobe, Yuhei Watanabe, Masakatu Morii

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2015

Improved All-Subkeys Recovery Attacks on FOX, KATAN and SHACAL-2 Block Ciphers.

Takanori Isobe, Kyoji Shibutani

IACR Cryptol. ePrint Arch., 2015

Generic Key Recovery Attack on Feistel Scheme.

Takanori Isobe, Kyoji Shibutani

IACR Cryptol. ePrint Arch., 2015

Midori: A Block Cipher for Low Energy (Extended Version).

Subhadeep Banik, Andrey Bogdanov, Takanori Isobe, Kyoji Shibutani, Harunaga Hiwatari, Toru Akishita, Francesco Regazzoni

IACR Cryptol. ePrint Arch., 2015

White-Box Cryptography Revisited: Space-Hard Ciphers.

Andrey Bogdanov, Takanori Isobe

Proceedings of the 22nd ACM SIGSAC Conference on Computer and Communications Security, 2015

How Secure is AES Under Leakage.

Andrey Bogdanov, Takanori Isobe

Proceedings of the Advances in Cryptology - ASIACRYPT 2015 - 21st International Conference on the Theory and Application of Cryptology and Information Security, Auckland, New Zealand, November 29, 2015

Midori: A Block Cipher for Low Energy.

Subhadeep Banik, Andrey Bogdanov, Takanori Isobe, Kyoji Shibutani, Harunaga Hiwatari, Toru Akishita, Francesco Regazzoni

Proceedings of the Advances in Cryptology - ASIACRYPT 2015 - 21st International Conference on the Theory and Application of Cryptology and Information Security, Auckland, New Zealand, November 29, 2015

2014

Expanding Weak-key Space of RC4.

Atsushi Nagao, Toshihiro Ohigashi, Takanori Isobe, Masakatu Morii

J. Inf. Process., 2014

Comprehensive Analysis of Initial Keystream Biases of RC4.

Takanori Isobe, Toshihiro Ohigashi, Yuhei Watanabe, Masakatu Morii

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2014

2013

A Single-Key Attack on the Full GOST Block Cipher.

Takanori Isobe

J. Cryptol., 2013

Slide Property of RAKAPOSHI and Its Application to Key Recovery Attack.

Takanori Isobe, Toshihiro Ohigashi, Masakatu Morii

J. Inf. Process., 2013

How to Recover Any Byte of Plaintext on RC4.

Toshihiro Ohigashi, Takanori Isobe, Yuhei Watanabe, Masakatu Morii

Proceedings of the Selected Areas in Cryptography - SAC 2013, 2013

Full Plaintext Recovery Attack on Broadcast RC4.

Takanori Isobe, Toshihiro Ohigashi, Yuhei Watanabe, Masakatu Morii

Proceedings of the Fast Software Encryption - 20th International Workshop, 2013

Related-Key Boomerang Attacks on KATAN32/48/64.

Takanori Isobe, Yu Sasaki, Jiageng Chen

Proceedings of the Information Security and Privacy - 18th Australasian Conference, 2013

2012

All Subkeys Recovery Attack on Block Ciphers: Extending Meet-in-the-Middle Approach.

Takanori Isobe, Kyoji Shibutani

Proceedings of the Selected Areas in Cryptography, 19th International Conference, 2012

Slide Cryptanalysis of Lightweight Stream Cipher RAKAPOSHI.

Takanori Isobe, Toshihiro Ohigashi, Masakatu Morii

Proceedings of the Advances in Information and Computer Security, 2012

Converting Meet-In-The-Middle Preimage Attack into Pseudo Collision Attack: Application to SHA-2.

Ji Li, Takanori Isobe, Kyoji Shibutani

Proceedings of the Fast Software Encryption - 19th International Workshop, 2012

Security Analysis of the Lightweight Block Ciphers XTEA, LED and Piccolo.

Takanori Isobe, Kyoji Shibutani

Proceedings of the Information Security and Privacy - 17th Australasian Conference, 2012

2011

Piccolo: An Ultra-Lightweight Blockcipher.

Kyoji Shibutani, Takanori Isobe, Harunaga Hiwatari, Atsushi Mitsuda, Toru Akishita, Taizo Shirai

Proceedings of the Cryptographic Hardware and Embedded Systems - CHES 2011 - 13th International Workshop, Nara, Japan, September 28, 2011

2010

Low-weight Pseudo Collision Attack on Shabal and Preimage Attack on Reduced Shabal-512.

Takanori Isobe, Taizo Shirai

IACR Cryptol. ePrint Arch., 2010

2009

A Chosen-IV Key Recovery Attack on Py and Pypy.

Takanori Isobe, Toshihiro Ohigashi, Hidenori Kuwakado, Masakatu Morii

IEICE Trans. Inf. Syst., 2009

Preimage Attacks on Reduced Tiger and SHA-2.

Takanori Isobe, Kyoji Shibutani

Proceedings of the Fast Software Encryption, 16th International Workshop, 2009