Outsider-Anonymous Broadcast Encryption with Keyword Search: Generic Construction, CCA Security, and with Sublinear Ciphertexts - Keita Emura; Kaisei Kajita; Go Ohtake (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2024)

Impact of Audio on Adaptive Japanese Subtitles and Captions Ruby - Shinya Abe; Shoko Fujii; Hideya Mino; Jun Goto; Go Ohtake; Satoshi Fujitsu; Kinji Matsumura; Hiroshi Fujisawa (J. Inf. Process., 2024)

Consecutive Adaptor Signature Scheme: From Two-Party to N-Party Settings - Kaisei Kajita; Go Ohtake; Tsuyoshi Takagi (Provable and Practical Security - 18th International Conference, ProvSec 2024, Gold Coast, QLD, Australia, September 25-27, 2024, Proceedings, Part I, 2024)

EncPDS: Encrypted Personal Data Stores via Key-Aggregate ID-Based Proxy Re-Encryption - Kaisei Kajita; Go Ohtake (17th International Conference on Security of Information and Networks, SIN 2024, Sydney, Australia, December 2-4, 2024, 2024)

Generalized Adaptor Signature Scheme: From Two-Party to N-Party Settings - Kaisei Kajita; Go Ohtake; Tsuyoshi Takagi (IACR Cryptol. ePrint Arch., 2024)

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., 2023)

Continuous Group Key Agreement with Flexible Authorization and Its Applications - Kaisei Kajita; Keita Emura; Kazuto Ogawa; Ryo Nojima; Go Ohtake (Proceedings of the 9th ACM International Workshop on Security and Privacy Analytics, IWSPA@CODASPY 2023, Charlotte, NC, USA, 26 April 2023, 2023)

Privacy-Preserving Data Management and Provision System for Personal Data Store - Kaisei Kajita; Kinji Matsumura; Go Ohtake (HCI International 2023 Posters - 25th International Conference on Human-Computer Interaction, HCII 2023, Copenhagen, Denmark, July 23-28, 2023, Proceedings, Part III, 2023)

Survey on the Impact of Listening to Audio for Adaptive Japanese Subtitles and Captions Ruby - Shinya Abe; Shoko Fujii; Hideya Mino; Jun Goto; Go Ohtake; Satoshi Fujitsu; Kinji Matsumura; Hiroshi Fujisawa (Proceedings of the 2023 ACM International Conference on Interactive Media Experiences, IMX 2023, Nantes, France, June 12-15, 2023, 2023)

Outsider-Anonymous Broadcast Encryption with Keyword Search: Generic Construction, CCA Security, and with Sublinear Ciphertexts - Keita Emura; Kaisei Kajita; Go Ohtake (IACR Cryptol. ePrint Arch., 2023)

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)

Private Set Intersection for Viewing History with Efficient Data Matching - Kaisei Kajita; Go Ohtake (HCI International 2022 Posters - 24th International Conference on Human-Computer Interaction, HCII 2022, Virtual Event, June 26 - July 1, 2022, Proceedings, Part IV, 2022)

Membership Privacy for Asynchronous Group Messaging - Keita Emura; Kaisei Kajita; Ryo Nojima; Kazuto Ogawa; Go Ohtake (Information Security Applications - 23rd International Conference, WISA 2022, Jeju Island, South Korea, August 24-26, 2022, Revised Selected Papers, 2022)

Membership Privacy for Asynchronous Group Messaging - Keita Emura; Kaisei Kajita; Ryo Nojima; Kazuto Ogawa; Go Ohtake (IACR Cryptol. ePrint Arch., 2022)

Short Lattice Signature Scheme with Tighter Reduction under Ring-SIS Assumption - Kaisei Kajita; Go Ohtake; Kazuto Ogawa; Koji Nuida; Tsuyoshi Takagi (IACR Cryptol. ePrint Arch., 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)

Privacy-Preserving System for Enriched-Integrated Service - Kaisei Kajita; Go Ohtake; Kazuto Ogawa (IEICE Trans. Inf. Syst., 2021)

Outsourcing scheme of ABE encryption secure against malicious adversary - Go Ohtake; Reihaneh Safavi-Naini; Liang Feng Zhang (Comput. Secur., 2019)

Privacy Preserving System for Real-Time Enriched-Integrated Service with Feedback to Providers - Kaisei Kajita; Kazuto Ogawa; Go Ohtake (HCI for Cybersecurity, Privacy and Trust - First International Conference, HCI-CPT 2019, Held as Part of the 21st HCI International Conference, HCII 2019, Orlando, FL, USA, July 26-31, 2019, Proceedings, 2019)

Chosen ciphertext secure keyed-homomorphic public-key cryptosystems - Keita Emura; Goichiro Hanaoka; Koji Nuida; Go Ohtake; Takahiro Matsuda; Shota Yamada (Des. Codes Cryptogr., 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)

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)

Outsourcing Scheme of ABE Encryption Secure against Malicious Adversary - Go Ohtake; Reihaneh Safavi-Naini; Liang Feng Zhang (Proceedings of the 3rd International Conference on Information Systems Security and Privacy, ICISSP 2017, Porto, Portugal, February 19-21, 2017, 2017)

Outsourcing of Verifiable Attribute-Based Keyword Search - Go Ohtake; Reihaneh Safavi-Naini; Liang Feng Zhang (Secure IT Systems - 22nd Nordic Conference, NordSec 2017, Tartu, Estonia, November 8-10, 2017, Proceedings, 2017)

Application Authentication System with Efficiently Updatable Signature - Kazuto Ogawa; Go Ohtake (IEICE Trans. Inf. Syst., 2016)

Attribute-Based Encryption for Range Attributes - Nuttapong Attrapadung; Goichiro Hanaoka; Kazuto Ogawa; Go Ohtake; Hajime Watanabe; Shota Yamada (Security and Cryptography for Networks - 10th International Conference, SCN 2016, Amalfi, Italy, August 31 - September 2, 2016, Proceedings, 2016)

Privacy preserving system for integrated broadcast-broadband services using attribute-based encryption - Go Ohtake; Kazuto Ogawa; Reihaneh Safavi-Naini (IEEE Trans. Consumer Electron., 2015)

Watermarking for HEVC/H.265 stream - Kazuto Ogawa; Go Ohtake (IEEE International Conference on Consumer Electronics, ICCE 2015, Las Vegas, NV, USA, January 9-12, 2015, 2015)

An application distribution management system for Hybridcast - Yuki Hironaka; Hisayuki Ohmata; Go Ohtake; Kazuhiro Otsuki; Masaru Takechi; Kenjiro Kai; Keigo Majima (IEEE International Conference on Consumer Electronics, ICCE 2015, Las Vegas, NV, USA, January 9-12, 2015, 2015)

Privacy preserving system for integrated broadcast-broadband services - Go Ohtake; Kazuto Ogawa (IEEE International Conference on Consumer Electronics, ICCE 2015, Las Vegas, NV, USA, January 9-12, 2015, 2015)

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)

Chosen Ciphertext Secure Keyed-Homomorphic Public-Key Encryption - Keita Emura; Goichiro Hanaoka; Go Ohtake; Takahiro Matsuda; Shota Yamada (Public-Key Cryptography - PKC 2013 - 16th International Conference on Practice and Theory in Public-Key Cryptography, Nara, Japan, February 26 - March 1, 2013. Proceedings, 2013)

Partially Wildcarded Attribute-based Encryption and Its Efficient Construction - Go Ohtake; Yuki Hironaka; Kenjiro Kai; Yosuke Endo; Goichiro Hanaoka; Hajime Watanabe; Shota Yamada; Kohei Kasamatsu; Takashi Yamakawa; Hideki Imai (SECRYPT 2013 - Proceedings of the 10th International Conference on Security and Cryptography, Reykjavík, Iceland, 29-31 July, 2013, 2013)

Chosen Ciphertext Secure Keyed-Homomorphic Public-Key Encryption - Keita Emura; Goichiro Hanaoka; Koji Nuida; Go Ohtake; Takahiro Matsuda; Shota Yamada (IACR Cryptol. ePrint Arch., 2013)

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 (Information Security Applications - 12th International Workshop, WISA 2011, Jeju Island, Korea, August 22-24, 2011. Revised Selected Papers, 2011)

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 (Provable Security - 4th International Conference, ProvSec 2010, Malacca, Malaysia, October 13-15, 2010. Proceedings, 2010)

A Trade-off Traitor Tracing Scheme - Go Ohtake; Kazuto Ogawa; Goichiro Hanaoka; Hideki Imai (IEICE Trans. Inf. Syst., 2009)

On the Theoretical Gap between Group Signatures with and without Unlinkability - Go Ohtake; Arisa Fujii; Goichiro Hanaoka; Kazuto Ogawa (Progress in Cryptology - AFRICACRYPT 2009, Second International Conference on Cryptology in Africa, Gammarth, Tunisia, June 21-25, 2009. Proceedings, 2009)

An Efficient Strong Key-Insulated Signature Scheme and Its Application - Go Ohtake; Goichiro Hanaoka; Kazuto Ogawa (Public Key Infrastructure, 5th European PKI Workshop: Theory and Practice, EuroPKI 2008, Trondheim, Norway, June 16-17, 2008, Proceedings, 2008)

Trade-Off Traitor Tracing - Kazuto Ogawa; Go Ohtake; Goichiro Hanaoka; Hideki Imai (Progress in Cryptology - INDOCRYPT 2007, 8th International Conference on Cryptology in India, Chennai, India, December 9-13, 2007, Proceedings, 2007)

Anonymous Authentication Scheme for Subscription Services - Arisa Fujii; Go Ohtake; Goichiro Hanaoka; Kazuto Ogawa (Knowledge-Based Intelligent Information and Engineering Systems, 11th International Conference, KES 2007, XVII Italian Workshop on Neural Networks, Vietri sul Mare, Italy, September 12-14, 2007, Proceedings, Part III, 2007)

Identified-Service Support System and Its Application to Network Broadcasting Services - Koichi Tanimoto; Takaaki Yamada; Haruyuki Nakamura; Arisa Fujii; Go Ohtake; Keigo Majima; Yoshihiro Fujita; Hiroyuki Imaizumi (Proceedings of the IEEE International Conference on Systems, Man and Cybernetics, Taipei, Taiwan, October 8-11, 2006, 2006)

Network Broadcasting System Using Viewer Information - Arisa Fujii; Haruyuki Nakamura; Go Ohtake; Keigo Majima; Yoshihiro Fujita; Hiroyuki Imaizumi; Koichi Tanimoto; Takaaki Yamada (Proceedings of the IEEE International Conference on Systems, Man and Cybernetics, Taipei, Taiwan, October 8-11, 2006, 2006)

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)

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 (Information Security and Privacy, 8th Australasian Conference, ACISP 2003, Wollongong, Australia, July 9-11, 2003, Proceedings, 2003)