Kazuto Ogawa

Publication Activity (10 Years)

Years Active: 2003-2023
Publications (10 Years): 24

Top Topics

Privacy Preserving

Signature Scheme

Designated Verifier

Top Venues

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

IACR Cryptol. ePrint Arch.

Publications

Hayato Kimura, Keita Emura, Takanori Isobe, Ryoma Ito, Kazuto Ogawa, Toshihiro Ohigashi
A Deeper Look into Deep Learning-based Output Prediction Attacks Using Weak SPN Block Ciphers. J. Inf. Process. 31 (2023)
Kaisei Kajita, Go Ohtake, Kazuto Ogawa, Koji Nuida, Tsuyoshi Takagi
Short Lattice Signature Scheme with Tighter Reduction under Ring-SIS Assumption. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 106 (3) (2023)
Kaisei Kajita, Keita Emura, Kazuto Ogawa, Ryo Nojima, Go Ohtake
Continuous Group Key Agreement with Flexible Authorization and Its Applications. IWSPA@CODASPY (2023)
Keita Emura, Kaisei Kajita, Ryo Nojima, Kazuto Ogawa, Go Ohtake
Membership Privacy for Asynchronous Group Messaging. IACR Cryptol. ePrint Arch. 2022 (2022)
Keita Emura, Kaisei Kajita, Ryo Nojima, Kazuto Ogawa, Go Ohtake
Membership Privacy for Asynchronous Group Messaging. WISA (2022)
Keita Emura, Kaisei Kajita, Ryo Nojima, Kazuto Ogawa, Go Ohtake
Providing Membership Privacy to the Asynchronous Ratcheting Trees Protocol without losing Scalability. J. Wirel. Mob. Networks Ubiquitous Comput. Dependable Appl. 13 (4) (2022)
Kaisei Kajita, Go Ohtake, Kazuto Ogawa, Koji Nuida, Tsuyoshi Takagi
Short Lattice Signature Scheme with Tighter Reduction under Ring-SIS Assumption. IACR Cryptol. ePrint Arch. 2022 (2022)
Hayato Kimura, Keita Emura, Takanori Isobe, Ryoma Ito, Kazuto Ogawa, Toshihiro Ohigashi
Output Prediction Attacks on Block Ciphers Using Deep Learning. ACNS Workshops (2022)
Kaisei Kajita, Keita Emura, Kazuto Ogawa, Ryo Nojima, Go Ohtake
Continuous Group Key Agreement with Flexible Authorization and Its Applications. IACR Cryptol. ePrint Arch. 2022 (2022)
Kaisei Kajita, Go Ohtake, Kazuto Ogawa
Privacy-Preserving System for Enriched-Integrated Service. IEICE Trans. Inf. Syst. (5) (2021)
Hayato Kimura, Keita Emura, Takanori Isobe, Ryoma Ito, Kazuto Ogawa, Toshihiro Ohigashi
Output Prediction Attacks on SPN Block Ciphers using Deep Learning. IACR Cryptol. ePrint Arch. 2021 (2021)
Kaisei Kajita, Kazuto Ogawa, Koji Nuida, Tsuyoshi Takagi
Short Lattice Signatures in the Standard Model with Efficient Tag Generation. ProvSec (2020)
Kaisei Kajita, Kazuto Ogawa, Eiichiro Fujisaki
A Constant-Size Signature Scheme with a Tighter Reduction from the CDH Assumption. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2020)
Kazuto Ogawa, Koji Nuida
Privacy Preservation for Versatile Pay-TV Services. HCI (29) (2019)
Kaisei Kajita, Kazuto Ogawa, Go Ohtake
Privacy Preserving System for Real-Time Enriched-Integrated Service with Feedback to Providers. HCI (29) (2019)
Nuttapong Attrapadung, Goichiro Hanaoka, Kazuto Ogawa, Go Ohtake, Hajime Watanabe, Shota Yamada
Attribute-Based Encryption for Range Attributes. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (9) (2018)
Kazuto Ogawa
Foreword. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2018)
Kaisei Kajita, Kazuto Ogawa, Eiichiro Fujisaki
A Constant-Size Signature Scheme with a Tighter Reduction from the CDH Assumption. IACR Cryptol. ePrint Arch. 2017 (2017)
Kaisei Kajita, Kazuto Ogawa, Eiichiro Fujisaki
A Constant-Size Signature Scheme with Tighter Reduction from CDH Assumption. ISC (2017)
Go Ohtake, Kazuto Ogawa, Goichiro Hanaoka, Shota Yamada, Kohei Kasamatsu, Takashi Yamakawa, Hideki Imai
Partially Wildcarded Ciphertext-Policy Attribute-Based Encryption and Its Performance Evaluation. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (9) (2017)
Kazuto Ogawa, Sakurako Tamura, Goichiro Hanaoka
Key Management for Versatile Pay-TV Services. STM (2017)
Kazuto Ogawa, Goichiro Hanaoka, Hideki Imai
How to Make Traitor Tracing Schemes Secure against a Content Comparison Attack in Actual Services. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2017)
Kazuto Ogawa, Go Ohtake
Application Authentication System with Efficiently Updatable Signature. IEICE Trans. Inf. Syst. (1) (2016)
Nuttapong Attrapadung, Goichiro Hanaoka, Kazuto Ogawa, Go Ohtake, Hajime Watanabe, Shota Yamada
Attribute-Based Encryption for Range Attributes. SCN (2016)
Kazuto Ogawa, Go Ohtake
Watermarking for HEVC/H.265 stream. ICCE (2015)
Go Ohtake, Kazuto Ogawa, Reihaneh Safavi-Naini
Privacy preserving system for integrated broadcast-broadband services using attribute-based encryption. IEEE Trans. Consumer Electron. 61 (3) (2015)
Go Ohtake, Kazuto Ogawa
Privacy preserving system for integrated broadcast-broadband services. ICCE (2015)
Kazuto Ogawa, Goichiro Hanaoka, Hideki Imai
Content and Key Management to Trace Traitors in Broadcasting Services. STM (2015)
Kazuto Ogawa, Tomoyuki Inoue
Practically secure update of scrambling scheme. BMSB (2015)
Kazuto Ogawa, Go Ohtake, Arisa Fujii, Goichiro Hanaoka
Weakened Anonymity of Group Signature and Its Application to Subscription Services. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (6) (2014)
Go Ohtake, Kazuto Ogawa
Application Authentication for Hybrid Services of Broadcasting and Communications Networks. WISA (2011)
Arisa Fujii, Go Ohtake, Goichiro Hanaoka, Nuttapong Attrapadung, Hajime Watanabe, Kazuto Ogawa, Hideki Imai
Secure Broadcast System with Simultaneous Individual Messaging. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (6) (2011)
Go Ohtake, Goichiro Hanaoka, Kazuto Ogawa
Efficient Broadcast Encryption with Personalized Messages. ProvSec (2010)
Go Ohtake, Goichiro Hanaoka, Kazuto Ogawa
Efficient Provider Authentication for Bidirectional Broadcasting Service. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (6) (2010)
Go Ohtake, Kazuto Ogawa, Goichiro Hanaoka, Hideki Imai
A Trade-off Traitor Tracing Scheme. IEICE Trans. Inf. Syst. (5) (2009)
Koji Nuida, Satoshi Fujitsu, Manabu Hagiwara, Takashi Kitagawa, Hajime Watanabe, Kazuto Ogawa, Hideki Imai
An improvement of discrete Tardos fingerprinting codes. Des. Codes Cryptogr. 52 (3) (2009)
Koji Nuida, Satoshi Fujitsu, Manabu Hagiwara, Hideki Imai, Takashi Kitagawa, Kazuto Ogawa, Hajime Watanabe
An Efficient 2-Secure and Short Random Fingerprint Code and Its Security Evaluation. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2009)
Go Ohtake, Arisa Fujii, Goichiro Hanaoka, Kazuto Ogawa
On the Theoretical Gap between Group Signatures with and without Unlinkability. AFRICACRYPT (2009)
Goichiro Hanaoka, Hideki Imai, Kazuto Ogawa, Hajime Watanabe
Chosen Ciphertext Secure Public Key Encryption with a Simple Structure. IWSEC (2008)
Go Ohtake, Goichiro Hanaoka, Kazuto Ogawa
An Efficient Strong Key-Insulated Signature Scheme and Its Application. EuroPKI (2008)
Koji Nuida, Satoshi Fujitsu, Manabu Hagiwara, Takashi Kitagawa, Hajime Watanabe, Kazuto Ogawa, Hideki Imai
An improvement of discrete Tardos fingerprinting codes. IACR Cryptol. ePrint Arch. 2008 (2008)
Arisa Fujii, Go Ohtake, Goichiro Hanaoka, Kazuto Ogawa
Anonymous Authentication Scheme for Subscription Services. KES (3) (2007)
Toshiyuki Fujisawa, Kazuto Ogawa, Takeshi Kimura, Masaki Inamura, Toshiaki Tanaka
Anonymous Prepaid Content Viewing System with Mobile Terminal. SECRYPT (2007)
Kazuto Ogawa, Goichiro Hanaoka, Kazukuni Kobara, Kanta Matsuura, Hideki Imai
Anonymous Pay-TV System with Secure Revenue Sharing. KES (3) (2007)
Koji Nuida, Satoshi Fujitsu, Manabu Hagiwara, Takashi Kitagawa, Hajime Watanabe, Kazuto Ogawa, Hideki Imai
An Improvement of Tardos's Collusion-Secure Fingerprinting Codes with Very Short Lengths. AAECC (2007)
Kazuto Ogawa, Goichiro Hanaoka, Hideki Imai
Traitor Tracing Scheme Secure against Adaptive Key Exposure and its Application to Anywhere TV Service. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (5) (2007)
Kazuto Ogawa, Goichiro Hanaoka, Hideki Imai
Extension of Broadcasting Service by Using Electronic Tokens. IEICE Trans. Inf. Syst. (11) (2007)
Satoshi Fujitsu, Koji Nuida, Manabu Hagiwara, Takashi Kitagawa, Hajime Watanabe, Kazuto Ogawa, Hideki Imai
A Tracing Algorithm for Short 2-Secure Probabilistic Fingerprinting Codes Strongly Protecting Innocent Users. CCNC (2007)
Kazuto Ogawa, Go Ohtake, Goichiro Hanaoka, Hideki Imai
Trade-Off Traitor Tracing. INDOCRYPT (2007)
Masaki Inamura, Toshiaki Tanaka, Toshiyuki Fujisawa, Kazuto Ogawa, Takeshi Kimura
Flexible License Transfer System Using Mobile Terminal. SECRYPT (2006)
Kazuto Ogawa, Goichiro Hanaoka, Hideki Imai
Adaptively Secure Traitor Tracing Against Key Exposure and Its Application to Anywhere TV Service. ACISP (2006)
Kazuto Ogawa, Goichiro Hanaoka, Hideki Imai
A secure traitor tracing scheme against key exposure. ISIT (2005)
Kazuto Ogawa, Goichiro Hanaoka, Hideki Imai
A Secure Traitor Tracing Scheme against Key Exposure CoRR (2005)
Goichiro Hanaoka, Kazuto Ogawa, Itsuro Murota, Go Ohtake, Keigo Majima, Seiichi Gohshi, Kimiyuki Oyamada, Seiichi Namba, Hideki Imai
Managing Encryption and Key Publication Independently in Digital Rights Management Systems. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2004)
Goichiro Hanaoka, Kazuto Ogawa, Itsuro Murota, Go Ohtake, Keigo Majima, Kimiyuki Oyamada, Seiichi Gohshi, Seiichi Namba, Hideki Imai
Separating Encryption and Key Issuance in Digital Rights Management Systems. ACISP (2003)