Kazuto Ogawa

56 papers B 1C 7Misc 8Journal 27Unranked 13
YearRankTypeTitle / Venue / Authors
2023 J jnl
A Deeper Look into Deep Learning-based Output Prediction Attacks Using Weak SPN Block Ciphers.
J. Inf. Process.
Hayato Kimura, Keita Emura, Takanori Isobe, Ryoma Ito, Kazuto Ogawa, Toshihiro Ohigashi
2023 — conf
Continuous Group Key Agreement with Flexible Authorization and Its Applications.
IWSPA@CODASPY
Kaisei Kajita, Keita Emura, Kazuto Ogawa, Ryo Nojima, Go Ohtake
2023 J jnl
Short Lattice Signature Scheme with Tighter Reduction under Ring-SIS Assumption.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Kaisei Kajita, Go Ohtake, Kazuto Ogawa, Koji Nuida, Tsuyoshi Takagi
2022 J jnl
Continuous Group Key Agreement with Flexible Authorization and Its Applications.
IACR Cryptol. ePrint Arch.
Kaisei Kajita, Keita Emura, Kazuto Ogawa, Ryo Nojima, Go Ohtake
2022 Misc conf
Membership Privacy for Asynchronous Group Messaging.
WISA
Keita Emura, Kaisei Kajita, Ryo Nojima, Kazuto Ogawa, Go Ohtake
2022 J jnl
Membership Privacy for Asynchronous Group Messaging.
IACR Cryptol. ePrint Arch.
Keita Emura, Kaisei Kajita, Ryo Nojima, Kazuto Ogawa, Go Ohtake
2022 — conf
Output Prediction Attacks on Block Ciphers Using Deep Learning.
ACNS Workshops
Hayato Kimura, Keita Emura, Takanori Isobe, Ryoma Ito, Kazuto Ogawa, Toshihiro Ohigashi
2022 J jnl
Providing Membership Privacy to the Asynchronous Ratcheting Trees Protocol without losing Scalability.
J. Wirel. Mob. Networks Ubiquitous Comput. Dependable Appl.
Keita Emura, Kaisei Kajita, Ryo Nojima, Kazuto Ogawa, Go Ohtake
2022 J jnl
Short Lattice Signature Scheme with Tighter Reduction under Ring-SIS Assumption.
IACR Cryptol. ePrint Arch.
Kaisei Kajita, Go Ohtake, Kazuto Ogawa, Koji Nuida, Tsuyoshi Takagi
2021 J jnl
Output Prediction Attacks on SPN Block Ciphers using Deep Learning.
IACR Cryptol. ePrint Arch.
Hayato Kimura, Keita Emura, Takanori Isobe, Ryoma Ito, Kazuto Ogawa, Toshihiro Ohigashi
2021 J jnl
Privacy-Preserving System for Enriched-Integrated Service.
IEICE Trans. Inf. Syst.
Kaisei Kajita, Go Ohtake, Kazuto Ogawa
2020 J jnl
A Constant-Size Signature Scheme with a Tighter Reduction from the CDH Assumption.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Kaisei Kajita, Kazuto Ogawa, Eiichiro Fujisaki
2020 C conf
Short Lattice Signatures in the Standard Model with Efficient Tag Generation.
ProvSec
Kaisei Kajita, Kazuto Ogawa, Koji Nuida, Tsuyoshi Takagi
2019 — conf
Privacy Preservation for Versatile Pay-TV Services.
HCI (29)
Kazuto Ogawa, Koji Nuida
2019 — conf
Privacy Preserving System for Real-Time Enriched-Integrated Service with Feedback to Providers.
HCI (29)
Kaisei Kajita, Kazuto Ogawa, Go Ohtake
2018 J jnl
Attribute-Based Encryption for Range Attributes.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Nuttapong Attrapadung, Goichiro Hanaoka, Kazuto Ogawa, Go Ohtake, Hajime Watanabe, Shota Yamada
2018 J jnl
Foreword.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Kazuto Ogawa
2017 C conf
A Constant-Size Signature Scheme with Tighter Reduction from CDH Assumption.
ISC
Kaisei Kajita, Kazuto Ogawa, Eiichiro Fujisaki
2017 J jnl
A Constant-Size Signature Scheme with a Tighter Reduction from the CDH Assumption.
IACR Cryptol. ePrint Arch.
Kaisei Kajita, Kazuto Ogawa, Eiichiro Fujisaki
2017 J jnl
How to Make Traitor Tracing Schemes Secure against a Content Comparison Attack in Actual Services.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Kazuto Ogawa, Goichiro Hanaoka, Hideki Imai
2017 — conf
Key Management for Versatile Pay-TV Services.
STM
Kazuto Ogawa, Sakurako Tamura, Goichiro Hanaoka
2017 J jnl
Partially Wildcarded Ciphertext-Policy Attribute-Based Encryption and Its Performance Evaluation.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Go Ohtake, Kazuto Ogawa, Goichiro Hanaoka, Shota Yamada, Kohei Kasamatsu, Takashi Yamakawa, Hideki Imai
2016 Misc ed.
Advances in Information and Computer Security - 11th International Workshop on Security, IWSEC 2016, Tokyo, Japan, September 12-14, 2016, Proceedings
IWSEC
Kazuto Ogawa, Katsunari Yoshioka
2016 J jnl
Application Authentication System with Efficiently Updatable Signature.
IEICE Trans. Inf. Syst.
Kazuto Ogawa, Go Ohtake
2016 Misc conf
Attribute-Based Encryption for Range Attributes.
SCN
Nuttapong Attrapadung, Goichiro Hanaoka, Kazuto Ogawa, Go Ohtake, Hajime Watanabe, Shota Yamada
2015 — conf
Content and Key Management to Trace Traitors in Broadcasting Services.
STM
Kazuto Ogawa, Goichiro Hanaoka, Hideki Imai
2015 — conf
Practically secure update of scrambling scheme.
BMSB
Kazuto Ogawa, Tomoyuki Inoue
2015 J jnl
Privacy preserving system for integrated broadcast-broadband services using attribute-based encryption.
IEEE Trans. Consumer Electron.
Go Ohtake, Kazuto Ogawa, Reihaneh Safavi-Naini
2015 C conf
Privacy preserving system for integrated broadcast-broadband services.
ICCE
Go Ohtake, Kazuto Ogawa
2015 C conf
Watermarking for HEVC/H.265 stream.
ICCE
Kazuto Ogawa, Go Ohtake
2014 J jnl
Weakened Anonymity of Group Signature and Its Application to Subscription Services.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Kazuto Ogawa, Go Ohtake, Arisa Fujii, Goichiro Hanaoka
2011 Misc conf
Application Authentication for Hybrid Services of Broadcasting and Communications Networks.
WISA
Go Ohtake, Kazuto Ogawa
2011 J jnl
Secure Broadcast System with Simultaneous Individual Messaging.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Arisa Fujii, Go Ohtake, Goichiro Hanaoka, Nuttapong Attrapadung, Hajime Watanabe, Kazuto Ogawa, Hideki Imai
2010 C conf
Efficient Broadcast Encryption with Personalized Messages.
ProvSec
Go Ohtake, Goichiro Hanaoka, Kazuto Ogawa
2010 J jnl
Efficient Provider Authentication for Bidirectional Broadcasting Service.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Go Ohtake, Goichiro Hanaoka, Kazuto Ogawa
2009 J jnl
A Trade-off Traitor Tracing Scheme.
IEICE Trans. Inf. Syst.
Go Ohtake, Kazuto Ogawa, Goichiro Hanaoka, Hideki Imai
2009 J jnl
An Efficient 2-Secure and Short Random Fingerprint Code and Its Security Evaluation.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Koji Nuida, Satoshi Fujitsu, Manabu Hagiwara, Hideki Imai, Takashi Kitagawa, Kazuto Ogawa, Hajime Watanabe
2009 J jnl
An improvement of discrete Tardos fingerprinting codes.
Des. Codes Cryptogr.
Koji Nuida, Satoshi Fujitsu, Manabu Hagiwara, Takashi Kitagawa, Hajime Watanabe, Kazuto Ogawa, Hideki Imai
2009 — conf
On the Theoretical Gap between Group Signatures with and without Unlinkability.
AFRICACRYPT
Go Ohtake, Arisa Fujii, Goichiro Hanaoka, Kazuto Ogawa
2008 — conf
An Efficient Strong Key-Insulated Signature Scheme and Its Application.
EuroPKI
Go Ohtake, Goichiro Hanaoka, Kazuto Ogawa
2008 J jnl
An improvement of discrete Tardos fingerprinting codes.
IACR Cryptol. ePrint Arch.
Koji Nuida, Satoshi Fujitsu, Manabu Hagiwara, Takashi Kitagawa, Hajime Watanabe, Kazuto Ogawa, Hideki Imai
2008 Misc conf
Chosen Ciphertext Secure Public Key Encryption with a Simple Structure.
IWSEC
Goichiro Hanaoka, Hideki Imai, Kazuto Ogawa, Hajime Watanabe
2007 — conf
A Tracing Algorithm for Short 2-Secure Probabilistic Fingerprinting Codes Strongly Protecting Innocent Users.
CCNC
Satoshi Fujitsu, Koji Nuida, Manabu Hagiwara, Takashi Kitagawa, Hajime Watanabe, Kazuto Ogawa, Hideki Imai
2007 — conf
An Improvement of Tardos's Collusion-Secure Fingerprinting Codes with Very Short Lengths.
AAECC
Koji Nuida, Satoshi Fujitsu, Manabu Hagiwara, Takashi Kitagawa, Hajime Watanabe, Kazuto Ogawa, Hideki Imai
2007 — conf
Anonymous Authentication Scheme for Subscription Services.
KES (3)
Arisa Fujii, Go Ohtake, Goichiro Hanaoka, Kazuto Ogawa
2007 — conf
Anonymous Pay-TV System with Secure Revenue Sharing.
KES (3)
Kazuto Ogawa, Goichiro Hanaoka, Kazukuni Kobara, Kanta Matsuura, Hideki Imai
2007 C conf
Anonymous Prepaid Content Viewing System with Mobile Terminal.
SECRYPT
Toshiyuki Fujisawa, Kazuto Ogawa, Takeshi Kimura, Masaki Inamura, Toshiaki Tanaka
2007 J jnl
Extension of Broadcasting Service by Using Electronic Tokens.
IEICE Trans. Inf. Syst.
Kazuto Ogawa, Goichiro Hanaoka, Hideki Imai
2007 Misc conf
Trade-Off Traitor Tracing.
INDOCRYPT
Kazuto Ogawa, Go Ohtake, Goichiro Hanaoka, Hideki Imai
2007 J jnl
Traitor Tracing Scheme Secure against Adaptive Key Exposure and its Application to Anywhere TV Service.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Kazuto Ogawa, Goichiro Hanaoka, Hideki Imai
2006 Misc conf
Adaptively Secure Traitor Tracing Against Key Exposure and Its Application to Anywhere TV Service.
ACISP
Kazuto Ogawa, Goichiro Hanaoka, Hideki Imai
2006 C conf
Flexible License Transfer System Using Mobile Terminal.
SECRYPT
Masaki Inamura, Toshiaki Tanaka, Toshiyuki Fujisawa, Kazuto Ogawa, Takeshi Kimura
2005 J jnl
A Secure Traitor Tracing Scheme against Key Exposure
CoRR
Kazuto Ogawa, Goichiro Hanaoka, Hideki Imai
2005 B conf
A secure traitor tracing scheme against key exposure.
ISIT
Kazuto Ogawa, Goichiro Hanaoka, Hideki Imai
2004 J jnl
Managing Encryption and Key Publication Independently in Digital Rights Management Systems.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Goichiro Hanaoka, Kazuto Ogawa, Itsuro Murota, Go Ohtake, Keigo Majima, Seiichi Gohshi, Kimiyuki Oyamada, Seiichi Namba, Hideki Imai
2003 Misc conf
Separating Encryption and Key Issuance in Digital Rights Management Systems.
ACISP
Goichiro Hanaoka, Kazuto Ogawa, Itsuro Murota, Go Ohtake, Keigo Majima, Kimiyuki Oyamada, Seiichi Gohshi, Seiichi Namba, Hideki Imai