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2020 – today
- 2023
[j20]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): 228-240 (2023)- [j19]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: 550-561 (2023) - [c28]Kaisei Kajita, Keita Emura, Kazuto Ogawa, Ryo Nojima, Go Ohtake:
Continuous Group Key Agreement with Flexible Authorization and Its Applications. IWSPA@CODASPY 2023: 3-13 - 2022
- [j18]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): 105-123 (2022) - [c27]Hayato Kimura, Keita Emura, Takanori Isobe, Ryoma Ito, Kazuto Ogawa, Toshihiro Ohigashi:
Output Prediction Attacks on Block Ciphers Using Deep Learning. ACNS Workshops 2022: 248-276 - [c26]Keita Emura, Kaisei Kajita, Ryo Nojima, Kazuto Ogawa, Go Ohtake:
Membership Privacy for Asynchronous Group Messaging. WISA 2022: 131-142 - [i7]Keita Emura, Kaisei Kajita, Ryo Nojima, Kazuto Ogawa, Go Ohtake:
Membership Privacy for Asynchronous Group Messaging. IACR Cryptol. ePrint Arch. 2022: 46 (2022) - [i6]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: 479 (2022) - [i5]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: 1768 (2022) - 2021
- [j17]Kaisei Kajita, Go Ohtake, Kazuto Ogawa:
Privacy-Preserving System for Enriched-Integrated Service. IEICE Trans. Inf. Syst. 104-D(5): 647-658 (2021) - [i4]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: 401 (2021) - 2020
- [j16]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. 103-A(1): 141-149 (2020) - [c25]Kaisei Kajita, Kazuto Ogawa, Koji Nuida, Tsuyoshi Takagi:
Short Lattice Signatures in the Standard Model with Efficient Tag Generation. ProvSec 2020: 85-102
2010 – 2019
- 2019
- [c24]Kaisei Kajita, Kazuto Ogawa, Go Ohtake:
Privacy Preserving System for Real-Time Enriched-Integrated Service with Feedback to Providers. HCI (29) 2019: 385-403 - [c23]Kazuto Ogawa, Koji Nuida:
Privacy Preservation for Versatile Pay-TV Services. HCI (29) 2019: 417-428 - 2018
- [j15]Kazuto Ogawa:
Foreword. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 101-A(1): 1-2 (2018) - [j14]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. 101-A(9): 1440-1455 (2018) - 2017
- [j13]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. 100-A(1): 34-49 (2017) - [j12]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. 100-A(9): 1846-1856 (2017) - [c22]Kaisei Kajita, Kazuto Ogawa, Eiichiro Fujisaki:
A Constant-Size Signature Scheme with Tighter Reduction from CDH Assumption. ISC 2017: 137-154 - [c21]Kazuto Ogawa, Sakurako Tamura, Goichiro Hanaoka:
Key Management for Versatile Pay-TV Services. STM 2017: 3-18 - [i3]Kaisei Kajita, Kazuto Ogawa, Eiichiro Fujisaki:
A Constant-Size Signature Scheme with a Tighter Reduction from the CDH Assumption. IACR Cryptol. ePrint Arch. 2017: 1116 (2017) - 2016
- [j11]Kazuto Ogawa, Go Ohtake:
Application Authentication System with Efficiently Updatable Signature. IEICE Trans. Inf. Syst. 99-D(1): 69-82 (2016) - [c20]Nuttapong Attrapadung, Goichiro Hanaoka, Kazuto Ogawa, Go Ohtake, Hajime Watanabe, Shota Yamada:
Attribute-Based Encryption for Range Attributes. SCN 2016: 42-61 - [e1]Kazuto Ogawa, Katsunari Yoshioka:
Advances in Information and Computer Security - 11th International Workshop on Security, IWSEC 2016, Tokyo, Japan, September 12-14, 2016, Proceedings. Lecture Notes in Computer Science 9836, Springer 2016, ISBN 978-3-319-44523-6 [contents] - 2015
- [j10]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): 328-335 (2015) - [c19]Kazuto Ogawa, Tomoyuki Inoue:
Practically secure update of scrambling scheme. BMSB 2015: 1-7 - [c18]Kazuto Ogawa, Go Ohtake:
Watermarking for HEVC/H.265 stream. ICCE 2015: 102-103 - [c17]Go Ohtake, Kazuto Ogawa:
Privacy preserving system for integrated broadcast-broadband services. ICCE 2015: 285-286 - [c16]Kazuto Ogawa, Goichiro Hanaoka, Hideki Imai:
Content and Key Management to Trace Traitors in Broadcasting Services. STM 2015: 236-252 - 2014
- [j9]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. 97-A(6): 1240-1258 (2014) - 2011
- [j8]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. 94-A(6): 1328-1337 (2011) - [c15]Go Ohtake, Kazuto Ogawa:
Application Authentication for Hybrid Services of Broadcasting and Communications Networks. WISA 2011: 171-186 - 2010
- [j7]Go Ohtake, Goichiro Hanaoka, Kazuto Ogawa:
Efficient Provider Authentication for Bidirectional Broadcasting Service. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 93-A(6): 1039-1051 (2010) - [c14]Go Ohtake, Goichiro Hanaoka, Kazuto Ogawa:
Efficient Broadcast Encryption with Personalized Messages. ProvSec 2010: 214-228
2000 – 2009
- 2009
- [j6]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): 339-362 (2009) - [j5]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. 92-A(1): 197-206 (2009) - [j4]Go Ohtake, Kazuto Ogawa, Goichiro Hanaoka, Hideki Imai:
A Trade-off Traitor Tracing Scheme. IEICE Trans. Inf. Syst. 92-D(5): 859-875 (2009) - [c13]Go Ohtake, Arisa Fujii, Goichiro Hanaoka, Kazuto Ogawa:
On the Theoretical Gap between Group Signatures with and without Unlinkability. AFRICACRYPT 2009: 149-166 - 2008
- [c12]Go Ohtake, Goichiro Hanaoka, Kazuto Ogawa:
An Efficient Strong Key-Insulated Signature Scheme and Its Application. EuroPKI 2008: 150-165 - [c11]Goichiro Hanaoka, Hideki Imai, Kazuto Ogawa, Hajime Watanabe:
Chosen Ciphertext Secure Public Key Encryption with a Simple Structure. IWSEC 2008: 20-33 - [i2]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: 338 (2008) - 2007
- [j3]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. 90-A(5): 1000-1011 (2007) - [j2]Kazuto Ogawa, Goichiro Hanaoka, Hideki Imai:
Extension of Broadcasting Service by Using Electronic Tokens. IEICE Trans. Inf. Syst. 90-D(11): 1741-1750 (2007) - [c10]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: 80-89 - [c9]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: 1068-1072 - [c8]Kazuto Ogawa, Go Ohtake, Goichiro Hanaoka, Hideki Imai:
Trade-Off Traitor Tracing. INDOCRYPT 2007: 331-340 - [c7]Arisa Fujii, Go Ohtake, Goichiro Hanaoka, Kazuto Ogawa:
Anonymous Authentication Scheme for Subscription Services. KES (3) 2007: 975-983 - [c6]Kazuto Ogawa, Goichiro Hanaoka, Kazukuni Kobara, Kanta Matsuura, Hideki Imai:
Anonymous Pay-TV System with Secure Revenue Sharing. KES (3) 2007: 984-991 - [c5]Toshiyuki Fujisawa, Kazuto Ogawa, Takeshi Kimura, Masaki Inamura, Toshiaki Tanaka:
Anonymous Prepaid Content Viewing System with Mobile Terminal. SECRYPT 2007: 281-288 - 2006
- [c4]Kazuto Ogawa, Goichiro Hanaoka, Hideki Imai:
Adaptively Secure Traitor Tracing Against Key Exposure and Its Application to Anywhere TV Service. ACISP 2006: 123-135 - [c3]Masaki Inamura, Toshiaki Tanaka, Toshiyuki Fujisawa, Kazuto Ogawa, Takeshi Kimura:
Flexible License Transfer System Using Mobile Terminal. SECRYPT 2006: 397-404 - 2005
- [c2]Kazuto Ogawa, Goichiro Hanaoka, Hideki Imai:
A secure traitor tracing scheme against key exposure. ISIT 2005: 1873-1877 - [i1]Kazuto Ogawa, Goichiro Hanaoka, Hideki Imai:
A Secure Traitor Tracing Scheme against Key Exposure. CoRR abs/cs/0508011 (2005) - 2004
- [j1]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. 87-A(1): 160-172 (2004) - 2003
- [c1]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: 365-376
Coauthor Index
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