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.　Vol. 2025　No. 2　p. 705-742　2025/03　Research paper (scientific journal)

Key Collisions on AES and Its Applications.

Kodai Taiyama, Kosei Sakamoto, Ryoma Ito 0001, Kazuma Taka, Takanori Isobe

ASIACRYPT (7)　p. 267-300　2024/12　Research paper (international conference proceedings)

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.　Vol. 2024　No. 2　p. 545-587　2024　Research paper (scientific journal)

Coefficient Grouping for Complex Affine Layers.

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

CRYPTO　p. 540-572　2023　Research paper (international conference proceedings)

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

ESORICS (1)　p. 229-248　2023　Research paper (international conference proceedings)

Coefficient Grouping: Breaking Chaghri and More.

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

EUROCRYPT (4)　p. 287-317　2023　Research paper (international conference proceedings)

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

EUROCRYPT (4)　p. 189-219　2023　Research paper (international conference proceedings)

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.　Vol. 2023　No. 2　p. 115-154　2023　Research paper (scientific journal)

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

Fukang Liu, Santanu Sarkar 0001, Gaoli Wang, Willi Meier, Takanori Isobe

ASIACRYPT (1)　p. 225-255　2022　Research paper (international conference proceedings)

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

Yosuke Todo, Takanori Isobe

IACR Transactions on Symmetric Cryptology　Vol. 2022　No. 3　p. 368-402　2022

New Cryptanalysis of ZUC-256 Initialization Using Modular Differences.

Fukang Liu, Willi Meier, Santanu Sarkar 0001, Gaoli Wang, Ryoma Ito 0001, Takanori Isobe 0001

IACR Transactions on Symmetric Cryptology　Vol. 2022　No. 3　p. 152-190　2022　Research paper (scientific journal)

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

Fukang Liu, Willi Meier, Santanu Sarkar 0001, Takanori Isobe 0001

IACR Transactions on Symmetric Cryptology　Vol. 2022　No. 3　p. 102-122　2022　Research paper (scientific journal)

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

Fukang Liu, Santanu Sarkar 0001, Willi Meier, Takanori Isobe 0001

Journal of Cryptology　Vol. 35　No. 4　p. 28-28　2022　Research paper (scientific journal)

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

Fukang Liu, Santanu Sarkar, Willi Meier, Takanori Isobe

ASIACRYPT 2021　p. 214-240　2021　Research paper (international conference proceedings)

Perfect Trees: Designing Energy-Optimal Symmetric Encryption Primitives.

Andrea Caforio, Subhadeep Banik, Yosuke Todo, Willi Meier, Takanori Isobe 0001, Fukang Liu, Bin Zhang 0003

IACR Trans. Symmetric Cryptol.　Vol. 2021　No. 4　p. 36-73　2021　Research paper (scientific journal)

Yoroi: Updatable Whitebox Cryptography.

Yuji Koike, Takanori Isobe 0001

IACR Trans. Cryptogr. Hardw. Embed. Syst.　Vol. 2021　No. 4　p. 587-617　2021　Research paper (scientific journal)

Security Analysis of SFrame.

Takanori Isobe 0001, Ryoma Ito 0001, Kazuhiko Minematsu

Computer Security – ESORICS 2021　p. 127-146　2021　Research paper (international conference proceedings)

Weak Keys in Reduced AEGIS and Tiaoxin.

Fukang Liu, Takanori Isobe 0001, Willi Meier, Kosei Sakamoto

IACR Cryptol. ePrint Arch.　Vol. 2021　p. 187-187　2021　Research paper (scientific journal)

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

Fukang Liu, Takanori Isobe, Willi Meier

Advances in Cryptology - CRYPTO 2021 - 41st Annual International Cryptology Conference　p. 368-401　2021　Research paper (international conference proceedings)

Weak Keys in Reduced AEGIS and Tiaoxin.

Fukang Liu, Takanori Isobe 0001, Willi Meier, Kosei Sakamoto

IACR Trans. Symmetric Cryptol.　Vol. 2021　No. 2　p. 104-139　2021　Research paper (scientific journal)

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

Kosei Sakamoto, Fukang Liu, Yuto Nakano, Shinsaku Kiyomoto, Takanori Isobe 0001

IACR Trans. Symmetric Cryptol.　Vol. 2021　No. 2　p. 1-30　2021　Research paper (scientific journal)

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

Fukang Liu, Takanori Isobe 0001, Willi Meier

IACR Trans. Symmetric Cryptol.　Vol. 2021　No. 1　p. 185-216　2021　Research paper (scientific journal)

Orthros: A Low-Latency PRF.

Subhadeep Banik, Takanori Isobe 0001, Fukang Liu, Kazuhiko Minematsu, Kosei Sakamoto

IACR Trans. Symmetric Cryptol.　Vol. 2021　No. 1　p. 37-77　2021　Research paper (scientific journal)

Atom: A Stream Cipher with Double Key Filter.

Subhadeep Banik, Andrea Caforio, Takanori Isobe 0001, Fukang Liu, Willi Meier, Kosei Sakamoto, Santanu Sarkar 0001

IACR Trans. Symmetric Cryptol.　Vol. 2021　No. 1　p. 5-36　2021　Research paper (scientific journal)

Automatic Verification of Differential Characteristics: Application to Reduced Gimli.

Fukang Liu, Takanori Isobe, Willi Meier

Advances in Cryptology - CRYPTO 2020 - 40th Annual International Cryptology Conference　p. 219-248　2020　Research paper (international conference proceedings)

Efficient Collision Attack Frameworks for RIPEMD-160.

Fukang Liu, Christoph Dobraunig, Florian Mendel, Takanori Isobe 0001, Gaoli Wang, Zhenfu Cao

CRYPTO 2019　p. 117-149　2019　Research paper (international conference proceedings)

Parallel SAT framework to find clustering of differential characteristics and its applications

Kosei Sakamoto, Ryoma Ito, Takanori Isobe

Journal of Information Security and Applications　Vol. 94　p. 104203-104203　2025/11　Research paper (scientific journal)

Collision Attacks on SPONGENT with Grouping Method

Keita Toyama, Kosei Sakamoto, Takanori Isobe

Proceedings of Selected Areas in Cryptography　2025/08　Research paper (international conference proceedings)

Strengthening Key Scheduling of AES-256 with Minimal Software Modifications.

Shoma Kawakami, Kazuma Taka, Atsushi Tanaka, Tatsuya Ishikawa, Takanori Isobe

ACISP (1)　p. 98-115　2025/07　Research paper (international conference proceedings)

SAT-based Differential Analysis of Initialization Phase of AEGIS/Tiaoxin-346/Rocca/Rocca-S

Takuro SHIRAYA, Kosei SAKAMOTO, Takanori ISOBE

IEICE Transactions on Information and Systems　2025/06　Research paper (scientific journal)

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

Takuro Shiraya, Kosei Sakamoto, Takanori Isobe

Journal of Information Processing　Vol. 33　p. 563-582　2025/05　Research paper (scientific journal)

Security analysis of SFrame.

Takanori Isobe, Ryoma Ito, Kazuhiko Minematsu

J. Inf. Secur. Appl.　Vol. 89　p. 103958-103958　2025/02　Research paper (scientific journal)

Forgery Attacks on SipHash.

Kosuke Sasaki, Rikuto Kurahara, Kosei Sakamoto, Takanori Isobe

ACISP (1)　p. 3-22　2025　Research paper (international conference proceedings)

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.　Vol. 108　No. 6　p. 816-833　2025　Research paper (scientific journal)

Finding New Differential Characteristics on SPECK Family.

Rikuto Kurahara, Kosei Sakamoto, Takanori Isobe

IEICE Trans. Fundam. Electron. Commun. Comput. Sci.　Vol. 108　No. 5　p. 760-763　2025　Research paper (scientific journal)

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

Atsushi Tanaka, Rentaro Shiba, Kosei Sakamoto, Mostafizar Rahman, Takuro Shiraya, Takanori Isobe 0001

INDOCRYPT (1)　p. 143-164　2024/12　Research paper (international conference proceedings)

Differential fault attack on AES-based encryption schemes: application to B5G/6G ciphers - Rocca, Rocca-S and AEGIS.

Ravi Anand, Takanori Isobe, Anup Kumar Kundu, Mostafizar Rahman, Sahiba Suryawanshi

Journal of Cryptographic Engineering　Vol. 14　No. 4　p. 595-607　2024/11　Research paper (scientific journal)

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

Takuro Shiraya, Kosei Sakamoto, Takanori Isobe 0001

Advances in Information and Computer Security - 19th International Workshop on Security(IWSEC)　p. 3-22　2024/10　Research paper (international conference proceedings)

Security Analysis on End-to-End Encryption of Zoom Mail.

Shogo Shiraki, Takanori Isobe 0001

ISITA　p. 413-418　2024/10　Research paper (international conference proceedings)

Collision Attacks on Hashing Modes of Areion.

Kodai Taiyama, Kosei Sakamoto, Rentaro Shiba, Takanori Isobe 0001

Cryptology and Network Security - 23rd International Conference　p. 265-285　2024/10　Research paper (international conference proceedings)

On the Key-Commitment Properties of Forkcipher-based AEADs.

Mostafizar Rahman, Samir Kundu, Takanori Isobe 0001

IACR Communications in Cryptology　Vol. 1　No. 4　p. 32-32　2024/10　Research paper (scientific journal)

Quantum Key Recovery Attacks on 4-Round Iterated Even-Mansour with Two Keys.

Ravi Anand, Shibam Ghosh, Takanori Isobe 0001, Rentaro Shiba

Information Security - 27th International Conference　p. 87-103　2024/09　Research paper (international conference proceedings)

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

Rikuto Kurahara, Kosei Sakamoto, Yuto Nakano, Takanori Isobe 0001

Information Security and Privacy - 29th Australasian Conference　p. 77-97　2024/07　Research paper (international conference proceedings)

Revisiting the Boomerang Attack From a Perspective of 3-Differential.

Libo Wang, Ling Song 0001, Baofeng Wu, Mostafizar Rahman, Takanori Isobe

IEEE Trans. Inf. Theory　Vol. 70　No. 7　p. 5343-5357　2024/07　Research paper (scientific journal)

Looking Further into the Security of End-to-End Encryption of SFrame.

Shogo Shiraki, Hayato Kimura 0002, Takanori Isobe 0001

Journal of Information Processing　Vol. 32　p. 679-689　2024/05　Research paper (scientific journal)

Restricted near collision attack on Plantlet.

Satyam Kumar, Sandip Kumar Mondal, Santanu Sarkar, Takanori Isobe, Anubhab Baksi, Avishek Adhikari

J. Cryptogr. Eng.　Vol. 14　No. 1　p. 19-34　2024/04　Research paper (scientific journal)

Improving the Security Bounds against Differential Attacks for Pholkos Family.

Nobuyuki Takeuchi, Kosei Sakamoto, Takuro Shiraya, Takanori Isobe 0001

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences　Vol. 107　No. 8　p. 1196-1204　2024/03　Research paper (scientific journal)

Analysis of Atom against quantum attacks.

Ravi Anand, Rimpa Nandi, Takanori Isobe

IET Quantum Commun.　Vol. 5　No. 1　p. 88-102　2024/03　Research paper (scientific journal)

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

Kosei Sakamoto, Ryoma Ito, Takanori Isobe

Selected Areas in Cryptography – SAC 2023　p. 409-428　2024/02/19　Research paper (international conference proceedings)

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

Shion Utsumi, Kosei Sakamoto, Takanori Isobe 0001

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences　Vol. 107　No. 8　p. 1186-1195　2024/02　Research paper (scientific journal)

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

Shion Utsumi, Motoki Nakahashi, Kosei Sakamoto, Takanori Isobe

Inf. Process. Lett.　Vol. 184　p. 106436-106436　2024/02　Research paper (scientific journal)

Key Committing Attacks against AES-based AEAD Schemes.

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

IACR Trans. Symmetric Cryptol.　Vol. 2024　No. 1　p. 135-157　2024/01　Research paper (scientific journal)

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

Takanori Isobe, Ryoma Ito, Kazuhiko Minematsu

Journal of Information Processing　Vol. 31　p. 523-536　2023/09/15　Research paper (scientific journal)

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

Shion Utsumi, Kosei Sakamoto, Takanori Isobe

IET Information Security　Vol. 17　No. 4　p. 616-625　2023/07　Research paper (scientific journal)

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

Takuro Shiraya, Nobuyuki Takeuchi, Kosei Sakamoto, Takanori Isobe

IET Information Security　Vol. 17　No. 3　p. 458-467　2023/05　Research paper (scientific journal)

Quantum security analysis of Rocca.

Ravi Anand, Takanori Isobe

Quantum Inf. Process.　Vol. 22　No. 4　p. 164-164　2023/04　Research paper (scientific journal)

mPoW: How to Make Proof of Work Meaningful.

Takaki Asanuma, Takanori Isobe

IEICE Trans. Fundam. Electron. Commun. Comput. Sci.　Vol. 106　No. 3　p. 333-340　2023/03　Research paper (scientific journal)

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.　Vol. 106　No. 3　p. 253-262　2023/03　Research paper (scientific journal)

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

Journal of Information Processing　Vol. 31　p. 550-561　2023　Research paper (scientific journal)

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

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

ACISP　p. 403-430　2023　Research paper (international conference proceedings)

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

Takaki Asanuma, Takanori Isobe

J. Inf. Process.　Vol. 31　p. 88-96　2023　Research paper (scientific journal)

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

Rentaro Shiba, Ravi Anand, Kazuhiko Minematsu, Takanori Isobe

IET Inf. Secur.　Vol. 17　No. 1　p. 131-146　2023/01　Research paper (scientific journal)

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

Kazuma Taka, Tatsuya Ishikawa, Kosei Sakamoto, Takanori Isobe

CT-RSA　p. 277-304　2023　Research paper (international conference proceedings)

On Optimality of the Round Function of Rocca.

Nobuyuki Takeuchi, Kosei Sakamoto, Takanori Isobe

IEICE Trans. Fundam. Electron. Commun. Comput. Sci.　Vol. 106　No. 1　p. 45-53　2023　Research paper (scientific journal)

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

Jin Hoki, Takanori Isobe 0001, Ryoma Ito 0001, Fukang Liu, Kosei Sakamoto

Journal of Information Security and Applications　Vol. 65　p. 103100-103100　2022　Research paper (scientific journal)

Output Prediction Attacks on Block Ciphers Using Deep Learning

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

Lecture Notes in Computer Science　p. 248-276　2022　Part of collection (book)

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

Rentaro Shiba, Kosei Sakamoto, Takanori Isobe 0001

IET Information Security　Vol. 16　No. 3　p. 145-160　2022　Research paper (scientific journal)

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

Rentaro Shiba, Kosei Sakamoto, Fukang Liu, Kazuhiko Minematsu, Takanori Isobe 0001

IET Information Security　Vol. 16　No. 2　p. 75-85　2022　Research paper (scientific journal)

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

Takaki Asanuma, Takanori Isobe

IEICE Transactions on Information & Systems　Vol. 105　No. 2　p. 248-255　2022　Research paper (scientific journal)

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 0001

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences　Vol. 105-A　No. 3　p. 278-288　2022　Research paper (scientific journal)

Applying Byte-Shuffling to CLEFIA-Type Structure.

Kazuto Shimizu, Kosei Sakamoto, Takanori Isobe 0001

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences　Vol. 105-A　No. 3　p. 268-277　2022　Research paper (scientific journal)

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

Takaki Asanuma, Takanori Isobe 0001

J. Inf. Process.　Vol. 30　p. 75-83　2022　Research paper (scientific journal)

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

Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)　Vol. 12804　p. 535-564　2021　Research paper (international conference proceedings)

Output Prediction Attacks on SPN Block Ciphers using Deep Learning.

Hayato Kimura 0002, Keita Emura, Takanori Isobe 0001, Ryoma Ito 0001, Kazuto Ogawa, Toshihiro Ohigashi

IACR Cryptology ePrint Archive　Vol. 2021　p. 401-401　2021　Research paper (scientific journal)

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

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

Information Security and Privacy　p. 171-190　2021　Part of collection (book)

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

Ryoma Ito 0001, Rentaro Shiba, Kosei Sakamoto, Fukang Liu, Takanori Isobe 0001

J. Inf. Secur. Appl.　Vol. 59　p. 102860-102860　2021　Research paper (scientific journal)

Further Results on Efficient Implementations of Block Cipher Linear Layers.

Subhadeep Banik, Yuki Funabiki, Takanori Isobe 0001

IEICE Trans. Fundam. Electron. Commun. Comput. Sci.　Vol. 104-A　No. 1　p. 213-225　2021　Research paper (scientific journal)

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

Jin Hoki, Kosei Sakamoto, Fukang Liu, Kazuhiko Minematsu, Takanori Isobe 0001

IEICE Trans. Fundam. Electron. Commun. Comput. Sci.　Vol. 104-A　No. 1　p. 203-212　2021　Research paper (scientific journal)

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

Yuji Koike, Takuya Hayashi 0001, Jun Kurihara, Takanori Isobe 0001

IEICE Trans. Fundam. Electron. Commun. Comput. Sci.　Vol. 104-A　No. 1　p. 182-189　2021　Research paper (scientific journal)

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

Takanori Isobe 0001, Ryoma Ito 0001

IEEE Access　Vol. 9　p. 90677-90689　2021　Research paper (scientific journal)

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 0001

IEICE Trans. Fundam. Electron. Commun. Comput. Sci.　Vol. 103-A　No. 12　p. 1629-1639　2020　Research paper (scientific journal)

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

Fukang Liu, Takanori Isobe 0001

IEICE Trans. Fundam. Electron. Commun. Comput. Sci.　Vol. 103-A　No. 11　p. 1260-1273　2020　Research paper (scientific journal)

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

Takanori Isobe 0001, Kyoji Shibutani

IEICE Trans. Fundam. Electron. Commun. Comput. Sci.　Vol. 103-A　No. 7　p. 893-905　2020　Research paper (scientific journal)

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

Rintaro Fujita, Takanori Isobe 0001, Kazuhiko Minematsu

ACNS 2020　p. 187-207　2020　Research paper (international conference proceedings)

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

Yuji Koike, Kosei Sakamoto, Takuya Hayashi 0001, Takanori Isobe 0001

Information Security and Privacy - 25th Australasian Conference(ACISP)　p. 142-159　2020　Research paper (international conference proceedings)

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

Takanori Isobe 0001, Kazuhiko Minematsu

IEICE Trans. Fundam. Electron. Commun. Comput. Sci.　Vol. 103-A　No. 1　p. 313-324　2020　Research paper (scientific journal)

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

Kosei Sakamoto, Kazuhiko Minematsu, Nao Shibata, Maki Shigeri, Hiroyasu Kubo, Yuki Funabiki, Takanori Isobe 0001

IEICE Trans. Fundam. Electron. Commun. Comput. Sci.　Vol. 103-A　No. 1　p. 212-214　2020　Research paper (scientific journal)

Plaintext Recovery Attacks Against XTS Beyond Collisions.

Takanori Isobe 0001, Kazuhiko Minematsu

Selected Areas in Cryptography - SAC 2019 - 26th International Conference(SAC)　p. 103-123　2019　Research paper (international conference proceedings)

Iterative Differential Characteristic of TRIFLE-BC.

Fukang Liu, Takanori Isobe 0001

Selected Areas in Cryptography - SAC 2019 - 26th International Conference(SAC)　p. 85-100　2019　Research paper (international conference proceedings)

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

Fukang Liu, Takanori Isobe 0001

Advances in Information and Computer Security - 14th International Workshop on Security(IWSEC)　p. 306-326　2019　Research paper (international conference proceedings)

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 0001

Advances in Information and Computer Security - 14th International Workshop on Security(IWSEC)　p. 129-145　2019　Research paper (international conference proceedings)

More Results on Shortest Linear Programs.

Subhadeep Banik, Yuki Funabiki, Takanori Isobe 0001

Advances in Information and Computer Security - 14th International Workshop on Security(IWSEC)　p. 109-128　2019　Research paper (international conference proceedings)

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

Hayato Kimura 0002, Takanori Isobe 0001, Toshihiro Ohigashi

Seventh International Symposium on Computing and Networking Workshops　p. 333-338　2019　Research paper (international conference proceedings)

Cube-Based Cryptanalysis of Subterranean-SAE.

Fukang Liu, Takanori Isobe 0001, Willi Meier

IACR Trans. Symmetric Cryptol.　Vol. 2019　No. 4　p. 192-222　2019　Research paper (scientific journal)

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

Fukang Liu, Christoph Dobraunig, Florian Mendel, Takanori Isobe 0001, Gaoli Wang, Zhenfu Cao

IACR Trans. Symmetric Cryptol.　Vol. 2019　No. 3　p. 169-192　2019　Research paper (scientific journal)

Cryptanalysis of Plantlet.

Subhadeep Banik, Khashayar Barooti, Takanori Isobe 0001

IACR Trans. Symmetric Cryptol.　Vol. 2019　No. 3　p. 103-120　2019　Research paper (scientific journal)

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

Yonglin Hao, Takanori Isobe 0001, Lin Jiao, Chaoyun Li, Willi Meier, Yosuke Todo, Qingju Wang 0001

IEEE Trans. Computers　Vol. 68　No. 10　p. 1470-1486　2019　Research paper (scientific journal)

Improved Integral Attack on HIGHT.

Yuki Funabiki, Yosuke Todo, Takanori Isobe 0001, Masakatu Morii

IEICE Trans. Fundam. Electron. Commun. Comput. Sci.　Vol. 102-A　No. 9　p. 1259-1271　2019　Research paper (scientific journal)

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

Takanori Isobe 0001, Kyoji Shibutani

IEICE Trans. Fundam. Electron. Commun. Comput. Sci.　Vol. 102-A　No. 1　p. 17-26　2019　Research paper (scientific journal)

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

Array,Takanori Isobe, Array,Willi Meier

IEEE Trans. Computers　Vol. 67　No. 12　p. 1720-1736　2018

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

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

IEICE Transactions　Vol. 101-A　No. 11　p. 1869-1879　2018

Inverse gating for low energy encryption.

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

2018 IEEE International Symposium on Hardware Oriented Security and Trust, HOST 2018, Washington, DC, USA, April 30 - May 4, 2018　p. 173-176　2018

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

Takanori Isobe, Kazuhiko Minematsu

Computer Security - 23rd European Symposium on Research in Computer Security, ESORICS 2018, Barcelona, Spain, September 3-7, 2018, Proceedings, Part II　p. 249-268　2018

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

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

Advances in Cryptology - CRYPTO 2018 - 38th Annual International Cryptology Conference, Santa Barbara, CA, USA, August 19-23, 2018, Proceedings, Part I　p. 275-305　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

Advances in Cryptology - CRYPTO 2018 - 38th Annual International Cryptology Conference, Santa Barbara, CA, USA, August 19-23, 2018, Proceedings, Part II　p. 129-159　2018

Several MILP-Aided Attacks Against SNOW 2.0.

Yuki Funabiki, Yosuke Todo, Takanori Isobe, Masakatu Morii

Cryptology and Network Security - 17th International Conference, CANS 2018, Naples, Italy, September 30 - October 3, 2018, Proceedings　p. 394-413　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.　Vol. 2018　No. 2　p. 20-47　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.　Vol. 2018　No. 2　p. 1-19　2018

Cryptanalysis of Reduced Kreyvium.

Yuhei Watanabe, Takanori Isobe, Masakatu Morii

IEICE Transactions　Vol. 101-A　No. 9　p. 1548-1556　2018

On design of robust lightweight stream cipher with short internal state

Subhadeep Banik, Takanori Isobe, Masakatu Morii

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences　Vol. E101A　No. 1　p. 99-109　2018/01/01　Research paper (international conference proceedings)

Analysis and Improvements of the Full Spritz Stream Cipher

Subhadeep Banik, Takanori Isobe, Masakatu Morii

IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES　Vol. E100A　No. 6　p. 1296-1305　2017/06　Research paper (scientific journal)

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

Yuhei Watanabe, Takanori Isobe, Toshihiro Ohigashi, Masakatu Morii

IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES　Vol. E100A　No. 3　p. 803-810　2017/03　Research paper (scientific journal)

Evaluation of trapezium current mode in comparison to the discontinuous current Mode for Single Phase Grid-tied Inverter.

Jiantao Zhang, Rene A. Barrera-Cardenas, Takanori Isobe, Tadano Hiroshi

IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society, Beijing, China, October 29 - November 1, 2017　p. 1125-1132　2017

Cube attacks on non-blackbox polynomials based on division property

Yosuke Todo, Takanori Isobe, Yonglin Hao, Willi Meier

Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)　Vol. 10403　p. 250-279　2017　Research paper (international conference proceedings)

Low-data complexity attacks on Camellia

Takeru Koie, Takanori Isobe, Yosuke Todo, Masakatu Morii

Communications in Computer and Information Science　Vol. 719　p. 128-140　2017　Research paper (international conference proceedings)

New key recovery attacks on minimal two-round Even-Mansour ciphers

Takanori Isobe, Kyoji Shibutani

Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)　Vol. 10624　p. 244-263　2017　Research paper (international conference proceedings)

Conditional differential cryptanalysis for kreyvium

Yuhei Watanabe, Takanori Isobe, Masakatu Morii

Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)　Vol. 10342　p. 421-434　2017　Research paper (international conference proceedings)

Improved integral attack on hight

Yuki Funabiki, Yosuke Todo, Takanori Isobe, Masakatu Morii

Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)　Vol. 10342　p. 363-383　2017　Research paper (international conference proceedings)

Some cryptanalytic results on Lizard.

Subhadeep Banik, Takanori Isobe, Tingting Cui, Jian Guo

IACR Trans. Symmetric Cryptol.　Vol. 2017　No. 4　p. 82-98　2017

Analysis of Software Countermeasures for Whitebox Encryption.

Array,Andrey Bogdanov, Takanori Isobe,Martin Bjerregaard Jepsen

IACR Trans. Symmetric Cryptol.　Vol. 2017　No. 1　p. 307-328　2017

Some Proofs of Joint Distributions of Keystream Biases in RC4

Sonu Jha, Subhadeep Banik, Takanori Isobe, Toshihiro Ohigashi

PROGRESS IN CRYPTOLOGY - INDOCRYPT 2016　Vol. 10095　p. 305-321　2016　Research paper (international conference proceedings)

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 (HOST)　p. 55-60　2016　Research paper (international conference proceedings)

Cryptanalysis of the Full Spritz Stream Cipher

Subhadeep Banik, Takanori Isobe

FAST SOFTWARE ENCRYPTION (FSE 2016)　Vol. 9783　p. 63-77　2016　Research paper (international conference proceedings)

Towards Practical Whitebox Cryptography: Optimizing Efficiency and Space Hardness

Andrey Bogdanov, Takanori Isobe, Elmar Tischhauser

ADVANCES IN CRYPTOLOGY - ASIACRYPT 2016, PT I　Vol. 10031　p. 126-158　2016　Research paper (international conference proceedings)

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

Takanori Isobe, Kyoji Shibutani

FAST SOFTWARE ENCRYPTION, FSE 2014　Vol. 8540　p. 104-126　2015　Research paper (international conference proceedings)

White-box Cryptography Revisited: Space-Hard Ciphers

Andrey Bogdanov, Takanori Isobe

CCS'15: PROCEEDINGS OF THE 22ND ACM SIGSAC CONFERENCE ON COMPUTER AND COMMUNICATIONS SECURITY　p. 1058-1069　2015　Research paper (international conference proceedings)

Midori: A Block Cipher for Low Energy

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

ADVANCES IN CRYPTOLOGY - ASIACRYPT 2015, PT II　Vol. 9453　p. 411-436　2015　Research paper (international conference proceedings)

How Secure is AES Under Leakage

Andrey Bogdanov, Takanori Isobe

ADVANCES IN CRYPTOLOGY - ASIACRYPT 2015, PT II　Vol. 9453　p. 361-385　2015　Research paper (international conference proceedings)

Full Plaintext Recovery Attacks on RC4 Using Multiple Biases

Toshihiro Ohigashi, Takanori Isobe, Yuhei Watanabe, Masakatu Morii

IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES　Vol. E98A　No. 1　p. 81-91　2015/01　Research paper (scientific journal)

How to Recover Any Byte of Plaintext on RC4

Toshihiro Ohigashi, Takanori Isobe, Yuhei Watanabe, Masakatu Morii

SELECTED AREAS IN CRYPTOGRAPHY - SAC 2013　Vol. 8282　p. 155-173　2014　Research paper (international conference proceedings)

Full Plaintext Recovery Attack on Broadcast RC4

Takanori Isobe, Toshihiro Ohigashi, Yuhei Watanabe, Masakatu Morii

FAST SOFTWARE ENCRYPTION (FSE 2013)　Vol. 8424　p. 179-202　2014　Research paper (international conference proceedings)

Expandingweak-key space of RC4

Atsushi Nagao, Toshihiro Ohigashi, Takanori Isobe, Masakatu Morii

Journal of Information Processing　Vol. 22　No. 2　p. 357-365　2014　Research paper (scientific journal)

Comprehensive Analysis of Initial Keystream Biases of RC4

Takanori Isobe, Toshihiro Ohigashi, Yuhei Watanabe, Masakatu Morii

IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES　Vol. E97A　No. 1　p. 139-151　2014/01　Research paper (scientific journal)

Slide Property of RAKAPOSHI and Its Application to Key Recovery Attack

Isobe Takanori, Ohigashi Toshihiro, Morii Masakatu

IMT　Vol. 8　No. 4　p. 987-994　2013

All subkeys recovery attack on block ciphers: Extending meet-in-the-middle approach

Takanori Isobe, Kyoji Shibutani

Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)　Vol. 7707　p. 202-221　2013　Research paper (international conference proceedings)

Generic Key Recovery Attack on Feistel Scheme

Takanori Isobe, Kyoji Shibutani

ADVANCES IN CRYPTOLOGY - ASIACRYPT 2013, PT I　Vol. 8269　p. 464-485　2013　Research paper (international conference proceedings)

Related-key boomerang attacks on KATAN32/48/64

Takanori Isobe, Yu Sasaki, Jiageng Chen

Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)　Vol. 7959　p. 268-285　2013　Research paper (international conference proceedings)

Offshore-Wind-Farm Configuration Using Diode Rectifier With MERS in Current Link Topology.

Takayuki Kawaguchi, Tsukasa Sakazaki, Takanori Isobe, Ryuichi Shimada

IEEE Trans. Industrial Electronics　Vol. 60　No. 7　p. 2930-2937　2013

A single-key attack on the full GOST block cipher

Takanori Isobe

Journal of Cryptology　Vol. 26　No. 1　p. 172-189　2013　Research paper (scientific journal)

Slide property of RAKAPOSHI and its application to key recovery attack

Takanori Isobe, Toshihiro Ohigashi, Masakatu Morii

Journal of Information Processing　Vol. 21　No. 4　p. 599-606　2013　Research paper (scientific journal)

Slide cryptanalysis of lightweight stream cipher RAKAPOSHI

Takanori Isobe, Toshihiro Ohigashi, Masakatu Morii

Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)　Vol. 7631　p. 138-155　2012　Research paper (international conference proceedings)

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

Ji Li, Takanori Isobe, Kyoji Shibutani

FAST SOFTWARE ENCRYPTION (FSE 2012)　Vol. 7549　p. 264-286　2012　Research paper (international conference proceedings)

Security analysis of the lightweight block ciphers XTEA, LED and Piccolo

Takanori Isobe, Kyoji Shibutani

Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)　Vol. 7372　p. 71-86　2012　Research paper (international conference proceedings)

A Single-Key Attack on the Full GOST Block Cipher

Takanori Isobe

FAST SOFTWARE ENCRYPTION (FSE 2011)　Vol. 6733　p. 290-305　2011　Research paper (international conference proceedings)

Piccolo: An Ultra-Lightweight Blockcipher

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

CRYPTOGRAPHIC HARDWARE AND EMBEDDED SYSTEMS - CHES 2011　Vol. 6917　p. 342-357　2011　Research paper (international conference proceedings)

Preimage Attacks on Reduced Tiger and SHA-2

Takanori Isobe, Kyoji Shibutani

FAST SOFTWARE ENCRYPTION　Vol. 5665　p. 139-155　2009　Research paper (international conference proceedings)

A Chosen-IV Key Recovery Attack on Py and Pypy

Takanori Isobe, Toshihiro Ohigashi, Hidenori Kuwakado, Masakatu Morii

IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS　Vol. E92D　No. 1　p. 32-40　2009/01　Research paper (scientific journal)

How to Break Py and Pypy by a Chosen-IV Attack

Takanori Isobe, Toshihiro Ohigashi, Hidenori Kuwakado, Masakatu Morii

Workshop Record of The State of the Art of Stream Ciphers (SASC) 2007　p. 340-352　2007/01　Research paper (international conference proceedings)