Kazuto Ogawa

According to our database, Kazuto Ogawa authored at least 47 papers between 2003 and 2023.

Collaborative distances:

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

2023

Short Lattice Signature Scheme with Tighter Reduction under Ring-SIS Assumption.

Kaisei Kajita, Go Ohtake, Kazuto Ogawa, Koji Nuida, Tsuyoshi Takagi

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

2022

Providing Membership Privacy to the Asynchronous Ratcheting Trees Protocol without losing Scalability.

Keita Emura, Kaisei Kajita, Ryo Nojima, Kazuto Ogawa, Go Ohtake

J. Wirel. Mob. Networks Ubiquitous Comput. Dependable Appl., 2022

Continuous Group Key Agreement with Flexible Authorization and Its Applications.

Kaisei Kajita, Keita Emura, Kazuto Ogawa, Ryo Nojima, Go Ohtake

IACR Cryptol. ePrint Arch., 2022

Membership Privacy for Asynchronous Group Messaging.

Keita Emura, Kaisei Kajita, Ryo Nojima, Kazuto Ogawa, Go Ohtake

IACR Cryptol. ePrint Arch., 2022

Output Prediction Attacks on Block Ciphers Using Deep Learning.

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

Proceedings of the Applied Cryptography and Network Security Workshops, 2022

2021

Privacy-Preserving System for Enriched-Integrated Service.

Kaisei Kajita, Go Ohtake, Kazuto Ogawa

IEICE Trans. Inf. Syst., 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

2020

A Constant-Size Signature Scheme with a Tighter Reduction from the CDH Assumption.

Kaisei Kajita, Kazuto Ogawa, Eiichiro Fujisaki

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

Short Lattice Signatures in the Standard Model with Efficient Tag Generation.

Kaisei Kajita, Kazuto Ogawa, Koji Nuida, Tsuyoshi Takagi

Proceedings of the Provable and Practical Security - 14th International Conference, ProvSec 2020, Singapore, November 29, 2020

2019

Privacy Preservation for Versatile Pay-TV Services.

Kazuto Ogawa, Koji Nuida

Proceedings of the HCI for Cybersecurity, Privacy and Trust, 2019

Privacy Preserving System for Real-Time Enriched-Integrated Service with Feedback to Providers.

Kaisei Kajita, Kazuto Ogawa, Go Ohtake

Proceedings of the HCI for Cybersecurity, Privacy and Trust, 2019

2018

Foreword.

Kazuto Ogawa

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

Attribute-Based Encryption for Range Attributes.

Nuttapong Attrapadung, Goichiro Hanaoka, Kazuto Ogawa, Go Ohtake, Hajime Watanabe, Shota Yamada

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

2017

Partially Wildcarded Ciphertext-Policy Attribute-Based Encryption and Its Performance Evaluation.

Go Ohtake, Kazuto Ogawa, Goichiro Hanaoka, Shota Yamada, Kohei Kasamatsu, Takashi Yamakawa, Hideki Imai

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

How to Make Traitor Tracing Schemes Secure against a Content Comparison Attack in Actual Services.

Kazuto Ogawa, Goichiro Hanaoka, Hideki Imai

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

Key Management for Versatile Pay-TV Services.

Kazuto Ogawa, Sakurako Tamura, Goichiro Hanaoka

Proceedings of the Security and Trust Management - 13th International Workshop, 2017

2016

Application Authentication System with Efficiently Updatable Signature.

Kazuto Ogawa, Go Ohtake

IEICE Trans. Inf. Syst., 2016

2015

Privacy preserving system for integrated broadcast-broadband services using attribute-based encryption.

Go Ohtake, Kazuto Ogawa, Reihaneh Safavi-Naini

IEEE Trans. Consumer Electron., 2015

Content and Key Management to Trace Traitors in Broadcasting Services.

Kazuto Ogawa, Goichiro Hanaoka, Hideki Imai

Proceedings of the Security and Trust Management - 11th International Workshop, 2015

Privacy preserving system for integrated broadcast-broadband services.

Go Ohtake, Kazuto Ogawa

Proceedings of the IEEE International Conference on Consumer Electronics, 2015

Watermarking for HEVC/H.265 stream.

Kazuto Ogawa, Go Ohtake

Proceedings of the IEEE International Conference on Consumer Electronics, 2015

Practically secure update of scrambling scheme.

Kazuto Ogawa, Tomoyuki Inoue

Proceedings of the 2015 IEEE International Symposium on Broadband Multimedia Systems and Broadcasting, 2015

2014

Weakened Anonymity of Group Signature and Its Application to Subscription Services.

Kazuto Ogawa, Go Ohtake, Arisa Fujii, Goichiro Hanaoka

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

2011

Secure Broadcast System with Simultaneous Individual Messaging.

Arisa Fujii, Go Ohtake, Goichiro Hanaoka, Nuttapong Attrapadung, Hajime Watanabe, Kazuto Ogawa, Hideki Imai

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2011

Application Authentication for Hybrid Services of Broadcasting and Communications Networks.

Go Ohtake, Kazuto Ogawa

Proceedings of the Information Security Applications - 12th International Workshop, 2011

2010

Efficient Provider Authentication for Bidirectional Broadcasting Service.

Go Ohtake, Goichiro Hanaoka, Kazuto Ogawa

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2010

Efficient Broadcast Encryption with Personalized Messages.

Go Ohtake, Goichiro Hanaoka, Kazuto Ogawa

Proceedings of the Provable Security - 4th International Conference, 2010

2009

A Trade-off Traitor Tracing Scheme.

Go Ohtake, Kazuto Ogawa, Goichiro Hanaoka, Hideki Imai

IEICE Trans. Inf. Syst., 2009

An Efficient 2-Secure and Short Random Fingerprint Code and Its Security Evaluation.

Koji Nuida, Satoshi Fujitsu, Manabu Hagiwara, Hideki Imai, Takashi Kitagawa, Kazuto Ogawa, Hajime Watanabe

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2009

An improvement of discrete Tardos fingerprinting codes.

Koji Nuida, Satoshi Fujitsu, Manabu Hagiwara, Takashi Kitagawa, Hajime Watanabe, Kazuto Ogawa, Hideki Imai

Des. Codes Cryptogr., 2009

On the Theoretical Gap between Group Signatures with and without Unlinkability.

Go Ohtake, Arisa Fujii, Goichiro Hanaoka, Kazuto Ogawa

Proceedings of the Progress in Cryptology, 2009

2008

Chosen Ciphertext Secure Public Key Encryption with a Simple Structure.

Goichiro Hanaoka, Hideki Imai, Kazuto Ogawa, Hajime Watanabe

Proceedings of the Advances in Information and Computer Security, 2008

An Efficient Strong Key-Insulated Signature Scheme and Its Application.

Go Ohtake, Goichiro Hanaoka, Kazuto Ogawa

Proceedings of the Public Key Infrastructure, 2008

2007

Extension of Broadcasting Service by Using Electronic Tokens.

Kazuto Ogawa, Goichiro Hanaoka, Hideki Imai

IEICE Trans. Inf. Syst., 2007

Traitor Tracing Scheme Secure against Adaptive Key Exposure and its Application to Anywhere TV Service.

Kazuto Ogawa, Goichiro Hanaoka, Hideki Imai

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2007

Anonymous Prepaid Content Viewing System with Mobile Terminal.

Toshiyuki Fujisawa, Kazuto Ogawa, Takeshi Kimura, Masaki Inamura, Toshiaki Tanaka

Proceedings of the SECRYPT 2007, 2007

Anonymous Pay-TV System with Secure Revenue Sharing.

Kazuto Ogawa, Goichiro Hanaoka, Kazukuni Kobara, Kanta Matsuura, Hideki Imai

Proceedings of the Knowledge-Based Intelligent Information and Engineering Systems, 2007

Anonymous Authentication Scheme for Subscription Services.

Arisa Fujii, Go Ohtake, Goichiro Hanaoka, Kazuto Ogawa

Proceedings of the Knowledge-Based Intelligent Information and Engineering Systems, 2007

Trade-Off Traitor Tracing.

Kazuto Ogawa, Go Ohtake, Goichiro Hanaoka, Hideki Imai

Proceedings of the Progress in Cryptology, 2007

A Tracing Algorithm for Short 2-Secure Probabilistic Fingerprinting Codes Strongly Protecting Innocent Users.

Satoshi Fujitsu, Koji Nuida, Manabu Hagiwara, Takashi Kitagawa, Hajime Watanabe, Kazuto Ogawa, Hideki Imai

Proceedings of the 4th IEEE Consumer Communications and Networking Conference, 2007

An Improvement of Tardos's Collusion-Secure Fingerprinting Codes with Very Short Lengths.

Koji Nuida, Satoshi Fujitsu, Manabu Hagiwara, Takashi Kitagawa, Hajime Watanabe, Kazuto Ogawa, Hideki Imai

Proceedings of the Applied Algebra, 2007

2006

Flexible License Transfer System Using Mobile Terminal.

Masaki Inamura, Toshiaki Tanaka, Toshiyuki Fujisawa, Kazuto Ogawa, Takeshi Kimura

Proceedings of the SECRYPT 2006, 2006

Adaptively Secure Traitor Tracing Against Key Exposure and Its Application to Anywhere TV Service.

Kazuto Ogawa, Goichiro Hanaoka, Hideki Imai

Proceedings of the Information Security and Privacy, 11th Australasian Conference, 2006

2005

A secure traitor tracing scheme against key exposure.

Kazuto Ogawa, Goichiro Hanaoka, Hideki Imai

Proceedings of the 2005 IEEE International Symposium on Information Theory, 2005

2004

Managing Encryption and Key Publication Independently in Digital Rights Management Systems.

Goichiro Hanaoka, Kazuto Ogawa, Itsuro Murota, Go Ohtake, Keigo Majima, Seiichi Gohshi, Kimiyuki Oyamada, Seiichi Namba, Hideki Imai

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2004

2003

Separating Encryption and Key Issuance in Digital Rights Management Systems.

Goichiro Hanaoka, Kazuto Ogawa, Itsuro Murota, Go Ohtake, Keigo Majima, Kimiyuki Oyamada, Seiichi Gohshi, Seiichi Namba, Hideki Imai

Proceedings of the Information Security and Privacy, 8th Australasian Conference, 2003