Ryoma Ito

According to our database, Ryoma Ito authored at least 34 papers between 2014 and 2025.

Collaborative distances:

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

2025

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

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

IACR Trans. Symmetric Cryptol., 2025

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

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

IACR Commun. Cryptol., 2025

Not in The Prophecies: Practical Attacks on Nostr.

Hayato Kimura, Ryoma Ito, Kazuhiko Minematsu, Shogo Shiraki, Takanori Isobe

Proceedings of the 10th IEEE European Symposium on Security and Privacy, 2025

2024

On the Effects of Neural Network-Based Output Prediction Attacks on the Design of Symmetric-Key Ciphers.

Hayato Watanabe, Ryoma Ito, Toshihiro Ohigashi

Proceedings of the Cyber Security, Cryptology, and Machine Learning, 2024

Key Collisions on AES and Its Applications.

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

Proceedings of the Advances in Cryptology - ASIACRYPT 2024, 2024

2023

PNB Based Differential Cryptanalysis of Salsa20 and ChaCha.

Nasratullah Ghafoori, Atsuko Miyaji, Ryoma Ito, Shotaro Miyashita

IEICE Trans. Inf. Syst., September, 2023

Key Committing Security of AEZ and More.

Yu Long Chen, Antonio Flórez-Gutiérrez, Akiko Inoue, Ryoma Ito, Tetsu Iwata, Kazuhiko Minematsu, Nicky Mouha, Yusuke Naito, Ferdinand Sibleyras, Yosuke Todo

IACR Trans. Symmetric Cryptol., 2023

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

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

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

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

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

J. Inf. Process., 2023

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

Takanori Isobe, Ryoma Ito, Kazuhiko Minematsu

J. Inf. Process., 2023

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

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

IACR Cryptol. ePrint Arch., 2023

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

Kosei Sakamoto, Ryoma Ito, Takanori Isobe

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

2022

New Cryptanalysis of ZUC-256 Initialization Using Modular Differences.

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

IACR Trans. Symmetric Cryptol., 2022

Cryptanalysis of Rocca and Feasibility of Its Security Claim.

Akinori Hosoyamada, Akiko Inoue, Ryoma Ito, Tetsu Iwata, Kazuhiko Minematsu, Ferdinand Sibleyras, Yosuke Todo

IACR Trans. Symmetric Cryptol., 2022

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

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

J. Inf. Secur. Appl., 2022

State-free End-to-End Encrypted Storage and Chat Systems based on Searchable Encryption.

Keita Emura, Ryoma Ito, Sachiko Kanamori, Ryo Nojima, Yohei Watanabe

Proceedings of the 24th International Conference on Enterprise Information Systems, 2022

Output Prediction Attacks on Block Ciphers Using Deep Learning.

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

Proceedings of the Applied Cryptography and Network Security Workshops, 2022

PNB-Focused Differential Cryptanalysis of ChaCha Stream Cipher.

Shotaro Miyashita, Ryoma Ito, Atsuko Miyaji

Proceedings of the Information Security and Privacy - 27th Australasian Conference, 2022

2021

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

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

J. Inf. Secur. Appl., 2021

New Iterated RC4 Key Correlations and their Application to Plaintext Recovery on WPA-TKIP.

Ryoma Ito, Atsuko Miyaji

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

PNB-based Differential Cryptanalysis of ChaCha Stream Cipher.

Shotaro Miyashita, Ryoma Ito, Atsuko Miyaji

IACR Cryptol. ePrint Arch., 2021

Finding Practical Distinguishers for ZUC-256 Using Modular Differences.

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

IACR Cryptol. ePrint Arch., 2021

Output Prediction Attacks on SPN Block Ciphers using Deep Learning.

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

IACR Cryptol. ePrint Arch., 2021

Security Analysis of SFrame.

Takanori Isobe, Ryoma Ito, Kazuhiko Minematsu

Proceedings of the Computer Security - ESORICS 2021, 2021

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

Takanori Isobe, Ryoma Ito

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

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

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

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

2020

Rotational Cryptanalysis of Salsa Core Function.

Ryoma Ito

Proceedings of the Information Security - 23rd International Conference, 2020

2018

New Iterated RC4 Key Correlations.

Ryoma Ito, Atsuko Miyaji

Proceedings of the Information Security and Privacy - 23rd Australasian Conference, 2018

2017

Refined Construction of RC4 Key Setting in WPA.

Ryoma Ito, Atsuko Miyaji

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

2016

Refined RC4 Key Correlations of Internal States in WPA.

Ryoma Ito, Atsuko Miyaji

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2016

Refined Glimpse Correlations of RC4.

Ryoma Ito, Atsuko Miyaji

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2016

2015

New Linear Correlations Related to State Information of RC4 PRGA Using IV in WPA.

Ryoma Ito, Atsuko Miyaji

Proceedings of the Fast Software Encryption - 22nd International Workshop, 2015

How TKIP Induces Biases of Internal States of Generic RC4.

Ryoma Ito, Atsuko Miyaji

Proceedings of the Information Security and Privacy - 20th Australasian Conference, 2015

2014

New Integrated Long-Term Glimpse of RC4.

Ryoma Ito, Atsuko Miyaji

Proceedings of the Information Security Applications - 15th International Workshop, 2014