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Gravity of the Situation: Security Analysis on Rocket.Chat E2EE
Hayato Kimura, Ryoma Ito, Kazuhiko Minematsu, Takanori Isobe
ACSAC 2025 2025年12月 研究論文(国際会議プロシーディングス)
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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 Communications in Cryptology 2025年9月
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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 Transactions on Symmetric Cryptology 2025年9月 研究論文(学術雑誌)
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Not Sealed: Practical Attacks on Nostr, a Decentralized Censorship-Resistant Protocol
Hayato Kimura, Ryoma Ito, Kazuhiko Minematsu, Shogo Shiraki, Takanori Isobe
Black Hat USA 202 Briefing 2025年8月 研究論文(研究会,シンポジウム資料等)
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Not in The Prophecies: Practical Attacks on Nostr.
Hayato Kimura, Ryoma Ito, Kazuhiko Minematsu, Shogo Shiraki, Takanori Isobe
EuroS&P p. 585-606 2025年6月 研究論文(国際会議プロシーディングス)
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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年3月 研究論文(学術雑誌)
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Key Collisions on AES and Its Applications.
Kodai Taiyama, Kosei Sakamoto, Ryoma Ito 0001, Kazuma Taka, Takanori Isobe
ASIACRYPT (7) p. 267-300 2024年12月 研究論文(国際会議プロシーディングス)
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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年 研究論文(学術雑誌)
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Coefficient Grouping for Complex Affine Layers.
Fukang Liu, Lorenzo Grassi, Clémence Bouvier, Willi Meier, Takanori Isobe
CRYPTO p. 540-572 2023年 研究論文(国際会議プロシーディングス)
出版者・発行元:Springer
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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年 研究論文(国際会議プロシーディングス)
出版者・発行元:Springer
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Coefficient Grouping: Breaking Chaghri and More.
Fukang Liu, Ravi Anand, Libo Wang, Willi Meier, Takanori Isobe
EUROCRYPT (4) p. 287-317 2023年 研究論文(国際会議プロシーディングス)
出版者・発行元:Springer
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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年 研究論文(国際会議プロシーディングス)
出版者・発行元:Springer
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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年 研究論文(学術雑誌)
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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年 研究論文(国際会議プロシーディングス)
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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年
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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年 研究論文(学術雑誌)
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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年 研究論文(学術雑誌)
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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年 研究論文(学術雑誌)
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Algebraic Attacks on Rasta and Dasta Using Low-Degree Equations.
ASIACRYPT 2021 p. 214-240 2021年 研究論文(国際会議プロシーディングス)
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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年 研究論文(学術雑誌)
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Yoroi: Updatable Whitebox Cryptography.
Yuji Koike, Takanori Isobe 0001
IACR Trans. Cryptogr. Hardw. Embed. Syst. Vol. 2021 No. 4 p. 587-617 2021年 研究論文(学術雑誌)
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Security Analysis of SFrame.
Takanori Isobe 0001, Ryoma Ito 0001, Kazuhiko Minematsu
Computer Security – ESORICS 2021 p. 127-146 2021年 研究論文(国際会議プロシーディングス)
出版者・発行元:Springer International Publishing
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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年 研究論文(学術雑誌)
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Cryptanalysis of Full LowMC and LowMC-M with Algebraic Techniques.
Fukang Liu, Takanori Isobe, Willi Meier
CRYPTO 2021 p. 368-401 2021年 研究論文(国際会議プロシーディングス)
出版者・発行元:
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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年 研究論文(学術雑誌)
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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年 研究論文(学術雑誌)
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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年 研究論文(学術雑誌)
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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年 研究論文(学術雑誌)
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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年 研究論文(学術雑誌)
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Automatic Verification of Differential Characteristics: Application to Reduced Gimli.
CRYPTO 2020 p. 219-248 2020年 研究論文(国際会議プロシーディングス)
出版者・発行元:
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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年 研究論文(国際会議プロシーディングス)
出版者・発行元:Springer
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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年11月 研究論文(学術雑誌)
出版者・発行元:Elsevier BV
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Collision Attacks on SPONGENT with Grouping Method
Keita Toyama, Kosei Sakamoto, Takanori Isobe
Proceedings of Selected Areas in Cryptography 2025年8月 研究論文(国際会議プロシーディングス)
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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年7月 研究論文(国際会議プロシーディングス)
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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年6月 研究論文(学術雑誌)
出版者・発行元:Institute of Electronics, Information and Communications Engineers (IEICE)
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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年5月 研究論文(学術雑誌)
出版者・発行元:Information Processing Society of Japan
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Security analysis of SFrame.
Takanori Isobe, Ryoma Ito, Kazuhiko Minematsu
J. Inf. Secur. Appl. Vol. 89 p. 103958-103958 2025年2月 研究論文(学術雑誌)
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Forgery Attacks on SipHash.
Kosuke Sasaki, Rikuto Kurahara, Kosei Sakamoto, Takanori Isobe
ACISP (1) p. 3-22 2025年 研究論文(国際会議プロシーディングス)
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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年 研究論文(学術雑誌)
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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年 研究論文(学術雑誌)
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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年12月 研究論文(国際会議プロシーディングス)
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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年11月 研究論文(学術雑誌)
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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年10月 研究論文(国際会議プロシーディングス)
出版者・発行元:Springer
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Security Analysis on End-to-End Encryption of Zoom Mail.
Shogo Shiraki, Takanori Isobe 0001
ISITA p. 413-418 2024年10月 研究論文(国際会議プロシーディングス)
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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年10月 研究論文(国際会議プロシーディングス)
出版者・発行元:Springer
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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年10月 研究論文(学術雑誌)
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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年9月 研究論文(国際会議プロシーディングス)
出版者・発行元:Springer
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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年7月 研究論文(国際会議プロシーディングス)
出版者・発行元:Springer
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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年7月 研究論文(学術雑誌)
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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年5月 研究論文(学術雑誌)
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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年4月 研究論文(学術雑誌)
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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年3月 研究論文(学術雑誌)
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Analysis of Atom against quantum attacks.
Ravi Anand, Rimpa Nandi, Takanori Isobe
IET Quantum Commun. Vol. 5 No. 1 p. 88-102 2024年3月 研究論文(学術雑誌)
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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年2月19日 研究論文(国際会議プロシーディングス)
出版者・発行元:Springer
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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年2月 研究論文(学術雑誌)
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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年2月 研究論文(学術雑誌)
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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年1月 研究論文(学術雑誌)
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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年9月15日 研究論文(学術雑誌)
出版者・発行元:Information Processing Society of Japan
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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年7月 研究論文(学術雑誌)
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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年5月 研究論文(学術雑誌)
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Quantum security analysis of Rocca.
Ravi Anand, Takanori Isobe
Quantum Inf. Process. Vol. 22 No. 4 p. 164-164 2023年4月 研究論文(学術雑誌)
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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年3月 研究論文(学術雑誌)
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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年3月 研究論文(学術雑誌)
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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年 研究論文(学術雑誌)
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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年 研究論文(国際会議プロシーディングス)
出版者・発行元:Springer
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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年 研究論文(学術雑誌)
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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年1月 研究論文(学術雑誌)
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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年 研究論文(国際会議プロシーディングス)
出版者・発行元:Springer
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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年 研究論文(学術雑誌)
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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年 研究論文(学術雑誌)
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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年 論文集(書籍)内論文
出版者・発行元:Springer International Publishing
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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年 研究論文(学術雑誌)
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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年 研究論文(学術雑誌)
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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年 研究論文(学術雑誌)
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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年 研究論文(学術雑誌)
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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年 研究論文(学術雑誌)
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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年 研究論文(学術雑誌)
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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年 研究論文(国際会議プロシーディングス)
出版者・発行元:Springer Science and Business Media Deutschland GmbH
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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年 研究論文(学術雑誌)
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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年 論文集(書籍)内論文
出版者・発行元:Springer International Publishing
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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年 研究論文(学術雑誌)
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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年 研究論文(学術雑誌)
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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年 研究論文(学術雑誌)
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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年 研究論文(学術雑誌)
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Security Analysis of End-to-End Encryption for Zoom Meetings.
Takanori Isobe 0001, Ryoma Ito 0001
IEEE Access Vol. 9 p. 90677-90689 2021年 研究論文(学術雑誌)
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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年 研究論文(学術雑誌)
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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年 研究論文(学術雑誌)
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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年 研究論文(学術雑誌)
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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年 研究論文(国際会議プロシーディングス)
出版者・発行元:Springer
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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年 研究論文(国際会議プロシーディングス)
出版者・発行元:Springer
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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年 研究論文(学術雑誌)
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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年 研究論文(学術雑誌)
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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年 研究論文(国際会議プロシーディングス)
出版者・発行元:Springer
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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年 研究論文(国際会議プロシーディングス)
出版者・発行元:Springer
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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年 研究論文(国際会議プロシーディングス)
出版者・発行元:Springer
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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年 研究論文(国際会議プロシーディングス)
出版者・発行元:Springer
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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年 研究論文(国際会議プロシーディングス)
出版者・発行元:Springer
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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年 研究論文(国際会議プロシーディングス)
出版者・発行元:IEEE
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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年 研究論文(学術雑誌)
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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年 研究論文(学術雑誌)
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Cryptanalysis of Plantlet.
Subhadeep Banik, Khashayar Barooti, Takanori Isobe 0001
IACR Trans. Symmetric Cryptol. Vol. 2019 No. 3 p. 103-120 2019年 研究論文(学術雑誌)
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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年 研究論文(学術雑誌)
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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年 研究論文(学術雑誌)
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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年 研究論文(学術雑誌)
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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年
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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年
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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年
出版者・発行元:IEEE Computer Society
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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年
出版者・発行元:Springer
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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年
出版者・発行元:Springer
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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年
出版者・発行元:Springer
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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年
出版者・発行元:Springer
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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年
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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年
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Cryptanalysis of Reduced Kreyvium.
Yuhei Watanabe, Takanori Isobe, Masakatu Morii
IEICE Transactions Vol. 101-A No. 9 p. 1548-1556 2018年
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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年1月1日 研究論文(国際会議プロシーディングス)
出版者・発行元:Institute of Electronics, Information and Communication, Engineers, IEICE
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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年6月 研究論文(学術雑誌)
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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年3月 研究論文(学術雑誌)
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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年
出版者・発行元:IEEE
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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年 研究論文(国際会議プロシーディングス)
出版者・発行元:Springer Verlag
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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年 研究論文(国際会議プロシーディングス)
出版者・発行元:Springer Verlag
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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年 研究論文(国際会議プロシーディングス)
出版者・発行元:Springer Verlag
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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年 研究論文(国際会議プロシーディングス)
出版者・発行元:Springer Verlag
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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年 研究論文(国際会議プロシーディングス)
出版者・発行元:Springer Verlag
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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年
-
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年
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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年 研究論文(国際会議プロシーディングス)
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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年 研究論文(国際会議プロシーディングス)
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Cryptanalysis of the Full Spritz Stream Cipher
Subhadeep Banik, Takanori Isobe
FAST SOFTWARE ENCRYPTION (FSE 2016) Vol. 9783 p. 63-77 2016年 研究論文(国際会議プロシーディングス)
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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年 研究論文(国際会議プロシーディングス)
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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年 研究論文(国際会議プロシーディングス)
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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年 研究論文(国際会議プロシーディングス)
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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年 研究論文(国際会議プロシーディングス)
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How Secure is AES Under Leakage
Andrey Bogdanov, Takanori Isobe
ADVANCES IN CRYPTOLOGY - ASIACRYPT 2015, PT II Vol. 9453 p. 361-385 2015年 研究論文(国際会議プロシーディングス)
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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年1月 研究論文(学術雑誌)
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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年 研究論文(国際会議プロシーディングス)
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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年 研究論文(国際会議プロシーディングス)
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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年 研究論文(学術雑誌)
出版者・発行元:Information Processing Society of Japan
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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年1月 研究論文(学術雑誌)
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Slide Property of RAKAPOSHI and Its Application to Key Recovery Attack
Isobe Takanori, Ohigashi Toshihiro, Morii Masakatu
Information and Media Technologies Vol. 8 No. 4 p. 987-994 2013年
出版者・発行元:Information and Media Technologies Editorial Board
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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年 研究論文(国際会議プロシーディングス)
出版者・発行元:Springer
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Generic Key Recovery Attack on Feistel Scheme
Takanori Isobe, Kyoji Shibutani
ADVANCES IN CRYPTOLOGY - ASIACRYPT 2013, PT I Vol. 8269 p. 464-485 2013年 研究論文(国際会議プロシーディングス)
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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年 研究論文(国際会議プロシーディングス)
出版者・発行元:Springer
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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年
-
A single-key attack on the full GOST block cipher
Takanori Isobe
Journal of Cryptology Vol. 26 No. 1 p. 172-189 2013年 研究論文(学術雑誌)
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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年 研究論文(学術雑誌)
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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年 研究論文(国際会議プロシーディングス)
出版者・発行元:Springer
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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年 研究論文(国際会議プロシーディングス)
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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年 研究論文(国際会議プロシーディングス)
出版者・発行元:Springer
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A Single-Key Attack on the Full GOST Block Cipher
Takanori Isobe
FAST SOFTWARE ENCRYPTION (FSE 2011) Vol. 6733 p. 290-305 2011年 研究論文(国際会議プロシーディングス)
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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年 研究論文(国際会議プロシーディングス)
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Preimage Attacks on Reduced Tiger and SHA-2
Takanori Isobe, Kyoji Shibutani
FAST SOFTWARE ENCRYPTION Vol. 5665 p. 139-155 2009年 研究論文(国際会議プロシーディングス)
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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年1月 研究論文(学術雑誌)
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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年1月 研究論文(国際会議プロシーディングス)