Tetsu Iwata

ORCID

Publication Activity (10 Years)

Years Active: 1998-2024
Publications (10 Years): 73

Top Venues

IACR Cryptol. ePrint Arch.

IACR Trans. Symmetric Cryptol.

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

FSE

Publications

Kento Tsuji, Tetsu Iwata
Feistel Ciphers Based on a Single Primitive. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 107 (8) (2024)
Ryunouchi Takeuchi, Yosuke Todo, Tetsu Iwata
Key Recovery, Universal Forgery, and Committing Attacks against Revised Rocca: How Finalization Affects Security. IACR Trans. Symmetric Cryptol. 2024 (2) (2024)
Ryunosuke Takeuchi, Yosuke Todo, Tetsu Iwata
Practical Committing Attacks against Rocca-S. IACR Cryptol. ePrint Arch. 2024 (2024)
Akiko Inoue, Tetsu Iwata, Kazuhiko Minematsu
Comprehensive Robustness Analysis of GCM, CCM, and OCB3. IACR Cryptol. ePrint Arch. 2024 (2024)
Kento Tsuji, Tetsu Iwata
Feistel Ciphers Based on a Single Primitive. IMACC (2023)
Isamu Furuya, Hayato Kasahara, Akiko Inoue, Kazuhiko Minematsu, Tetsu Iwata
PMACrx: A Vector-Input MAC for High-Dimensional Vectors with BBB Security. IWSEC (2023)
Yu Long Chen, Antonio Flórez-Gutiérrez, Akiko Inoue, Ryoma Ito, Tetsu Iwata, Kazuhiko Minematsu, Nicky Mouha, Yusuke Naito, Ferdinand Sibleyras, Yosuke Todo
Key Committing Security of AEZ and More. IACR Trans. Symmetric Cryptol. 2023 (4) (2023)
Akiko Inoue, Tetsu Iwata, Kazuhiko Minematsu
Analyzing the Provable Security Bounds of GIFT-COFB and Photon-Beetle. IACR Cryptol. ePrint Arch. 2022 (2022)
Akiko Inoue, Tetsu Iwata, Kazuhiko Minematsu
Analyzing the Provable Security Bounds of GIFT-COFB and Photon-Beetle. ACNS (2022)
Kazuo Shinagawa, Tetsu Iwata
Quantum attacks on Sum of Even-Mansour pseudorandom functions. Inf. Process. Lett. 173 (2022)
Chun Guo, Tetsu Iwata, Kazuhiko Minematsu
New indifferentiability security proof of MDPH hash function. IET Inf. Secur. 16 (4) (2022)
Akinori Hosoyamada, Akiko Inoue, Ryoma Ito, Tetsu Iwata, Kazuhiko Mimematsu, Ferdinand Sibleyras, Yosuke Todo
Cryptanalysis of Rocca and Feasibility of Its Security Claim. IACR Trans. Symmetric Cryptol. 2022 (3) (2022)
Makoto Habu, Kazuhiko Minematsu, Tetsu Iwata
Matching Attacks on Romulus-M. IACR Cryptol. ePrint Arch. 2022 (2022)
Makoto Habu, Kazuhiko Minematsu, Tetsu Iwata
Matching attacks on Romulus-M. IET Inf. Secur. 16 (6) (2022)
Kazuki Nakaya, Tetsu Iwata
Generalized Feistel Structures Based on Tweakable Block Ciphers. IACR Trans. Symmetric Cryptol. 2022 (4) (2022)
Kyoji Shibutani, Tetsu Iwata
On the (im)possibility of improving the round diffusion of generalized Feistel structures. Inf. Process. Lett. 174 (2022)
Akinori Hosoyamada, Tetsu Iwata
On Tight Quantum Security of HMAC and NMAC in the Quantum Random Oracle Model. CRYPTO (1) (2021)
Chun Guo, Tetsu Iwata, Kazuhiko Minematsu
New Indifferentiability Security Proof of MDPH Hash Function. IACR Cryptol. ePrint Arch. 2021 (2021)
Akinori Hosoyamada, Tetsu Iwata
Provably Quantum-Secure Tweakable Block Ciphers. IACR Trans. Symmetric Cryptol. 2021 (1) (2021)
Akinori Hosoyamada, Tetsu Iwata
On Tight Quantum Security of HMAC and NMAC in the Quantum Random Oracle Model. IACR Cryptol. ePrint Arch. 2021 (2021)
Akinori Hosoyamada, Tetsu Iwata
Indifferentiability of SKINNY-HASH Internal Functions. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (9) (2021)
Subhadeep Banik, Avik Chakraborti, Tetsu Iwata, Kazuhiko Minematsu, Mridul Nandi, Thomas Peyrin, Yu Sasaki, Siang Meng Sim, Yosuke Todo
GIFT-COFB. IACR Cryptol. ePrint Arch. 2020 (2020)
Akinori Hosoyamada, Tetsu Iwata
Provably Quantum-Secure Tweakable Block Ciphers. IACR Cryptol. ePrint Arch. 2020 (2020)
Akiko Inoue, Tetsu Iwata, Kazuhiko Minematsu, Bertram Poettering
Cryptanalysis of OCB2: Attacks on Authenticity and Confidentiality. J. Cryptol. 33 (4) (2020)
Ryota Nakamichi, Tetsu Iwata
Beyond-Birthday-Bound Secure Cryptographic Permutations from Ideal Ciphers with Long Keys. IACR Trans. Symmetric Cryptol. 2020 (2) (2020)
Avik Chakraborti, Tetsu Iwata, Kazuhiko Minematsu, Mridul Nandi
Blockcipher-Based Authenticated Encryption: How Small Can We Go? J. Cryptol. 33 (3) (2020)
Akinori Hosoyamada, Tetsu Iwata
Indifferentiability of SKINNY-HASH Internal Functions. IACR Cryptol. ePrint Arch. 2020 (2020)
Tetsu Iwata, Mustafa Khairallah, Kazuhiko Minematsu, Thomas Peyrin
Duel of the Titans: The Romulus and Remus Families of Lightweight AEAD Algorithms. IACR Trans. Symmetric Cryptol. 2020 (1) (2020)
Ryota Nakamichi, Tetsu Iwata
Iterative Block Ciphers from Tweakable Block Ciphers with Long Tweaks. IACR Trans. Symmetric Cryptol. 2019 (4) (2019)
Boyu Ni, Gembu Ito, Xiaoyang Dong, Tetsu Iwata
Quantum Attacks Against Type-1 Generalized Feistel Ciphers and Applications to CAST-256. INDOCRYPT (2019)
Zhenzhen Bao, Jian Guo, Tetsu Iwata, Kazuhiko Minematsu
ZOCB and ZOTR: Tweakable Blockcipher Modes for Authenticated Encryption with Full Absorption. IACR Trans. Symmetric Cryptol. 2019 (2) (2019)
Gembu Ito, Tetsu Iwata
Quantum Distinguishing Attacks against Type-1 Generalized Feistel Ciphers. IACR Cryptol. ePrint Arch. 2019 (2019)
Akinori Hosoyamada, Tetsu Iwata
Tight Quantum Security Bound of the 4-Round Luby-Rackoff Construction. IACR Cryptol. ePrint Arch. 2019 (2019)
Akiko Inoue, Tetsu Iwata, Kazuhiko Minematsu, Bertram Poettering
Cryptanalysis of OCB2: Attacks on Authenticity and Confidentiality. CRYPTO (1) (2019)
Gembu Ito, Akinori Hosoyamada, Ryutaroh Matsumoto, Yu Sasaki, Tetsu Iwata
Quantum Chosen-Ciphertext Attacks Against Feistel Ciphers. CT-RSA (2019)
Akinori Hosoyamada, Tetsu Iwata
4-Round Luby-Rackoff Construction is a qPRP. ASIACRYPT (1) (2019)
Zhenzhen Bao, Jian Guo, Tetsu Iwata, Kazuhiko Minematsu
ZOCB and ZOTR: Tweakable Blockcipher Modes for Authenticated Encryption with Full Absorption. IACR Cryptol. ePrint Arch. 2019 (2019)
Tetsu Iwata, Mustafa Khairallah, Kazuhiko Minematsu, Thomas Peyrin
Duel of the Titans: The Romulus and Remus Families of Lightweight AEAD Algorithms. IACR Cryptol. ePrint Arch. 2019 (2019)
Akiko Inoue, Tetsu Iwata, Kazuhiko Minematsu, Bertram Poettering
Cryptanalysis of OCB2: Attacks on Authenticity and Confidentiality. IACR Cryptol. ePrint Arch. 2019 (2019)
Tetsu Iwata, Virginie Lallemand, Gregor Leander, Yu Sasaki
Universal Forgery and Multiple Forgeries of MergeMAC and Generalized Constructions. CT-RSA (2019)
Joan Daemen, Tetsu Iwata, Nils Gregor Leander, Kaisa Nyberg
Symmetric Cryptography (Dagstuhl Seminar 18021). Dagstuhl Reports 8 (1) (2018)
Patrick Derbez, Tetsu Iwata, Ling Sun, Siwei Sun, Yosuke Todo, Haoyang Wang, Meiqin Wang
Cryptanalysis of AES-PRF and Its Dual. IACR Trans. Symmetric Cryptol. 2018 (2) (2018)
Kota Kondo, Yu Sasaki, Yosuke Todo, Tetsu Iwata
On the Design Rationale of SIMON Block Cipher: Integral Attacks and Impossible Differential Attacks against SIMON Variants. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2018)
Tetsu Iwata
Plaintext Recovery Attack of OCB2. IACR Cryptol. ePrint Arch. 2018 (2018)
Gembu Ito, Akinori Hosoyamada, Ryutaroh Matsumoto, Yu Sasaki, Tetsu Iwata
Quantum Chosen-Ciphertext Attacks against Feistel Ciphers. IACR Cryptol. ePrint Arch. 2018 (2018)
Tetsu Iwata, Virginie Lallemand, Gregor Leander, Yu Sasaki
Universal Forgery and Multiple Forgeries of MergeMAC and Generalized Constructions. IACR Cryptol. ePrint Arch. 2018 (2018)
Kazuya Imamura, Kazuhiko Minematsu, Tetsu Iwata
Integrity analysis of authenticated encryption based on stream ciphers. Int. J. Inf. Sec. 17 (5) (2018)
Kota Kondo, Yu Sasaki, Yosuke Todo, Tetsu Iwata
Analyzing Key Schedule of Simon: Iterative Key Differences and Application to Related-Key Impossible Differentials. IWSEC (2017)
Tetsu Iwata, Kazuhiko Minematsu, Thomas Peyrin, Yannick Seurin
ZMAC: A Fast Tweakable Block Cipher Mode for Highly Secure Message Authentication. IACR Cryptol. ePrint Arch. 2017 (2017)
Hiraku Morita, Jacob C. N. Schuldt, Takahiro Matsuda, Goichiro Hanaoka, Tetsu Iwata
On the Security of Schnorr Signatures, DSA, and ElGamal Signatures against Related-Key Attacks. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2017)
Tetsu Iwata, Yannick Seurin
Reconsidering the Security Bound of AES-GCM-SIV. IACR Cryptol. ePrint Arch. 2017 (2017)
Avik Chakraborti, Tetsu Iwata, Kazuhiko Minematsu, Mridul Nandi
Blockcipher-Based Authenticated Encryption: How Small Can We Go? CHES (2017)
Tetsu Iwata, Yannick Seurin
Reconsidering the Security Bound of AES-GCM-SIV. IACR Trans. Symmetric Cryptol. 2017 (4) (2017)
Hiraku Morita, Jacob C. N. Schuldt, Takahiro Matsuda, Goichiro Hanaoka, Tetsu Iwata
On the Security of Non-Interactive Key Exchange against Related-Key Attacks. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (9) (2017)
Kazuhiko Minematsu, Tetsu Iwata
Cryptanalysis of PMACx, PMAC2x, and SIVx. IACR Cryptol. ePrint Arch. 2017 (2017)
Tetsu Iwata, Kazuhiko Minematsu, Thomas Peyrin, Yannick Seurin
ZMAC: A Fast Tweakable Block Cipher Mode for Highly Secure Message Authentication. CRYPTO (3) (2017)
Avik Chakraborti, Tetsu Iwata, Kazuhiko Minematsu, Mridul Nandi
Blockcipher-based Authenticated Encryption: How Small Can We Go? IACR Cryptol. ePrint Arch. 2017 (2017)
Kazuhiko Minematsu, Tetsu Iwata
Cryptanalysis of PMACx, PMAC2x, and SIVx. IACR Trans. Symmetric Cryptol. 2017 (2) (2017)
Kazuya Imamura, Kazuhiko Minematsu, Tetsu Iwata
Integrity Analysis of Authenticated Encryption Based on Stream Ciphers. IACR Cryptol. ePrint Arch. 2016 (2016)
Kota Kondo, Yu Sasaki, Tetsu Iwata
On the Design Rationale of SIMON Block Cipher: Integral Attacks and Impossible Differential Attacks against SIMON Variants. IACR Cryptol. ePrint Arch. 2016 (2016)
Tetsu Iwata, Kazuhiko Minematsu
Stronger Security Variants of GCM-SIV. IACR Cryptol. ePrint Arch. 2016 (2016)
Tetsu Iwata, Bart Mennink, Damian Vizár
CENC is Optimally Secure. IACR Cryptol. ePrint Arch. 2016 (2016)
Tetsu Iwata, Kazuhiko Minematsu
Stronger Security Variants of GCM-SIV. IACR Trans. Symmetric Cryptol. 2016 (1) (2016)
Kazuya Imamura, Kazuhiko Minematsu, Tetsu Iwata
Integrity Analysis of Authenticated Encryption Based on Stream Ciphers. ProvSec (2016)
Kota Kondo, Yu Sasaki, Tetsu Iwata
On the Design Rationale of Simon Block Cipher: Integral Attacks and Impossible Differential Attacks against Simon Variants. ACNS (2016)
Frederik Armknecht, Tetsu Iwata, Kaisa Nyberg, Bart Preneel
Symmetric Cryptography (Dagstuhl Seminar 16021). Dagstuhl Reports 6 (1) (2016)
Yuichi Niwa, Keisuke Ohashi, Kazuhiko Minematsu, Tetsu Iwata
GCM Security Bounds Reconsidered. IACR Cryptol. ePrint Arch. 2015 (2015)
Hayato Kobayashi, Kazuhiko Minematsu, Tetsu Iwata
Optimality of Tweak Functions in CLOC. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (10) (2015)
Kazuhiko Minematsu, Tetsu Iwata
Tweak-Length Extension for Tweakable Blockciphers. IMACC (2015)
Yuichi Niwa, Keisuke Ohashi, Kazuhiko Minematsu, Tetsu Iwata
GCM Security Bounds Reconsidered. FSE (2015)
Kazuhiko Minematsu, Tetsu Iwata
Tweak-Length Extension for Tweakable Blockciphers. IACR Cryptol. ePrint Arch. 2015 (2015)
Hiraku Morita, Jacob C. N. Schuldt, Takahiro Matsuda, Goichiro Hanaoka, Tetsu Iwata
On the Security of the Schnorr Signature Scheme and DSA Against Related-Key Attacks. ICISC (2015)
Hiraku Morita, Jacob C. N. Schuldt, Takahiro Matsuda, Goichiro Hanaoka, Tetsu Iwata
On the Security of the Schnorr Signature Scheme and DSA against Related-Key Attacks. IACR Cryptol. ePrint Arch. 2015 (2015)
Yuki Asano, Shingo Yanagihara, Tetsu Iwata
Cryptanalysis of 249-, 250-, ..., 256-Bit Key HyRAL via Equivalent Keys. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2014)
Tetsu Iwata, Lei Wang
Impact of ANSI X9.24-1: 2009 Key Check Value on ISO/IEC 9797-1: 2011 MACs. FSE (2014)
Frederik Armknecht, Helena Handschuh, Tetsu Iwata, Bart Preneel
Symmetric Cryptography (Dagstuhl Seminar 14021). Dagstuhl Reports 4 (1) (2014)
Tetsu Iwata, Lei Wang
Impact of ANSI X9.24-1: 2009 Key Check Value on ISO/IEC 9797-1: 2011 MACs. IACR Cryptol. ePrint Arch. 2014 (2014)
Shingo Yanagihara, Tetsu Iwata
Type 1.x Generalized Feistel Structures. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (4) (2014)
Tetsu Iwata, Kazuhiko Minematsu, Jian Guo, Sumio Morioka
CLOC: Authenticated Encryption for Short Input. FSE (2014)
Tetsu Iwata, Kazuhiko Minematsu, Jian Guo, Sumio Morioka
CLOC: Authenticated Encryption for Short Input. IACR Cryptol. ePrint Arch. 2014 (2014)
Yasushi Osaki, Tetsu Iwata
Security of Hash-then-CBC Key Wrapping Revisited. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2013)
Kazuhiko Minematsu, Stefan Lucks, Hiraku Morita, Tetsu Iwata
Attacks and Security Proofs of EAX-Prime. FSE (2013)
Kazuhiko Minematsu, Stefan Lucks, Tetsu Iwata
Improved Authenticity Bound of EAX, and Refinements. IACR Cryptol. ePrint Arch. 2013 (2013)
Shingo Yanagihara, Tetsu Iwata
Improving the Permutation Layer of Type 1, Type 3, Source-Heavy, and Target-Heavy Generalized Feistel Structures. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2013)
Kazuhiko Minematsu, Stefan Lucks, Tetsu Iwata
Improved Authenticity Bound of EAX, and Refinements. ProvSec (2013)
Tetsu Iwata, Keisuke Ohashi, Kazuhiko Minematsu
Breaking and Repairing GCM Security Proofs. IACR Cryptol. ePrint Arch. 2012 (2012)
Tetsu Iwata, Keisuke Ohashi, Kazuhiko Minematsu
Breaking and Repairing GCM Security Proofs. CRYPTO (2012)
Kazuhiko Minematsu, Hiraku Morita, Tetsu Iwata
Cryptanalysis of EAXprime. IACR Cryptol. ePrint Arch. 2012 (2012)
Yasushi Osaki, Tetsu Iwata
Further More on Key Wrapping. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2012)
Yuki Asano, Shingo Yanagihara, Tetsu Iwata
Cryptanalysis of 256-Bit Key HyRAL via Equivalent Keys. ACNS (2012)
Kazuhiko Minematsu, Tetsu Iwata
Building Blockcipher from Tweakable Blockcipher: Extending FSE 2009 Proposal. IMACC (2011)
Yasushi Osaki, Tetsu Iwata
Security of Hash-then-CBC Key Wrapping Revisited. IMACC (2011)
Shingo Yanagihara, Tetsu Iwata
On Permutation Layer of Type 1, Source-Heavy, and Target-Heavy Generalized Feistel Structures. CANS (2011)
Shungo Nakamura, Tetsu Iwata
MPP Characteristics of Variants of Merkle-Damgård Iterated Hash Functions. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2010)
Atsushi Mitsuda, Tetsu Iwata
Tweakable Pseudorandom Permutation from Generalized Feistel Structure. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2010)
Tetsu Iwata, Kan Yasuda
HBS: A Single-Key Mode of Operation for Deterministic Authenticated Encryption. FSE (2009)
Tetsu Iwata, Kan Yasuda
BTM: A Single-Key, Inverse-Cipher-Free Mode for Deterministic Authenticated Encryption. Selected Areas in Cryptography (2009)
Tetsu Iwata
Authenticated Encryption Mode for Beyond the Birthday Bound Security. AFRICACRYPT (2008)
Atsushi Mitsuda, Tetsu Iwata
Tweakable Pseudorandom Permutation from Generalized Feistel Structure. ProvSec (2008)
Tetsu Iwata, Tohru Yagi, Kaoru Kurosawa
Security of the Five-Round Kasumi Type Permutation. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2008)

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Publication Activity (10 Years)

Top Topics

Top Venues

Tetsu Iwata