| 2025 | AINA | Honey-Proxy: Revealing Malicious Activities via Residential Proxies. | Hiroaki Kikuchi, Ryuichi Moriya, Takumi Kitahara, Hikari Fukuda |
| 2025 | ESORICS | A Pseudo-inverse Matrix-Based LDP for High-Dimensional Data. | Hiroaki Kikuchi |
| 2025 | ESORICS | Fine-Grained Data Poisoning Attack to Local Differential Privacy Protocols for Key-Value Data. | Terumi Yaguchi, Hiroaki Kikuchi |
| 2025 | MDAI | Differential Private Risk Factors Analysis of Polypharmacy. | Hiroaki Kikuchi, Andres Hernandez-Matamoros |
| 2024 | MDAI | A Poisoning-Resilient LDP Schema Leveraging Oblivious Transfer with the Hadamard Transform. | Masahiro Shimizu, Hiroaki Kikuchi |
| 2024 | PSD | Combinations of AI Models and XAI Metrics Vulnerable to Record Reconstruction Risk. | Ryotaro Toma, Hiroaki Kikuchi |
| 2024 | SoMeT | Meaningful Performance Analysis on Healthcare Data Under Local Differential Privacy. | Andres Hernandez-Matamoros, Hiroaki Kikuchi |
| 2023 | AINA | Expectation-Maximization Estimation for Key-Value Data Randomized with Local Differential Privacy. | Hikaru Horigome, Hiroaki Kikuchi, Chia-Mu Yu |
| 2023 | MDAI | Local Differential Privacy Protocol for Making Key-Value Data Robust Against Poisoning Attacks. | Hikaru Horigome, Hiroaki Kikuchi, Chia-Mu Yu |
| 2023 | NSS | New LDP Approach Using VAE. | Andres Hernandez-Matamoros, Hiroaki Kikuchi |
| 2023 | PST | An Efficient Local Differential Privacy Scheme Using Bayesian Ridge Regression. | Andres Hernandez-Matamoros, Hiroaki Kikuchi |
| 2023 | SEC | Privacy-Preserving Clustering for Multi-dimensional Data Randomization Under LDP. | Hiroaki Kikuchi |
| 2022 | MDAI | Improvement of Estimate Distribution with Local Differential Privacy. | Hikaru Horigome, Hiroaki Kikuchi |
| 2022 | PST | A Vulnerability in Video Anonymization - Privacy Disclosure from Face-obfuscated video. | Hiroaki Kikuchi, Shun Miyoshi, Takafumi Mori, Andres Hernandez-Matamoros |
| 2021 | AINA | Reidentification Risk from Pseudonymized Customer Payment History. | Hiroaki Kikuchi |
| 2021 | ESORICS | Best Security Measures to Reduce Cyber-Incident and Data Breach Risks. | Hiroaki Kikuchi, Michihiro Yamada, Kazuki Ikegami, Koji Inui |
| 2021 | IWDW | More Accurate and Robust PRNU-Based Source Camera Identification with 3-Step 3-Class Approach. | Annjhih Hsiao, Takao Takenouchi, Hiroaki Kikuchi, Kazuo Sakiyama, Noriyuki Miura |
| 2020 | ESORICS | Differentially Private Profiling of Anonymized Customer Purchase Records. | Hiroaki Kikuchi |
| 2020 | WISA | Analysis on Malicious Residential Hosts Activities Exploited by Residential IP Proxy Services. | Akihiro Hanzawa, Hiroaki Kikuchi |
| 2019 | ICISSP | Robust Person Identification based on DTW Distance of Multiple-Joint Gait Pattern. | Takafumi Mori, Hiroaki Kikuchi |
| 2019 | ICISSP | Mathematical Model to Estimate Loss by Cyber Incident in Japan. | Michihiro Yamada, Hiroaki Kikuchi, Naoki Matsuyama, Koji Inui |
| 2018 | AINA | Privacy Preserved Spectral Analysis Using IoT mHealth Biomedical Data for Stress Estimation. | Xuping Huang, Hiroaki Kikuchi, Chun-I Fan |
| 2018 | AINA | Risk of Re-identification from Payment Card Histories in Multiple Domains. | Satoshi Ito, Reo Harada, Hiroaki Kikuchi |
| 2018 | PST | Evaluation and Development of Onomatopoeia CAPTCHAs. | Michihiro Yamada, Riko Shigeno, Hiroaki Kikuchi, Maki Sakamoto |
| 2017 | AINA | Privacy-Preserving Multiple Linear Regression of Vertically Partitioned Real Medical Datasets. | Hiroaki Kikuchi, Chika Hamanaga, Hideo Yasunaga, Hiroki Matsui, Hideki Hashimoto |
| 2017 | HCI | Sharing or Non-sharing Credentials: A Study of What Motivates People to Be Malicious Insiders. | Koichi Niihara, Michihiro Yamada, Hiroaki Kikuchi |
| 2017 | HCI | Decision Tree Analysis on Environmental Factors of Insider Threats. | Michihiro Yamada, Koichi Niihara, Hiroaki Kikuchi |
| 2017 | SMC | Audio-CAPTCHA with distinction between random phoneme sequences and words spoken by multi-speaker. | Michitomo Yamaguchi, Hiroaki Kikuchi |
| 2016 | AINA | Ice and Fire: Quantifying the Risk of Re-identification and Utility in Data Anonymization. | Hiroaki Kikuchi, Takayasu Yamaguchi, Koki Hamada, Yuji Yamaoka, Hidenobu Oguri, Jun Sakuma |
| 2016 | ESORICS | A Study from the Data Anonymization Competition Pwscup 2015. | Hiroaki Kikuchi, Takayasu Yamaguchi, Koki Hamada, Yuji Yamaoka, Hidenobu Oguri, Jun Sakuma |
| 2016 | HCI | Primary Factors of Malicious Insider in E-learning Model. | Koichi Niihara, Hiroaki Kikuchi |
| 2016 | Mobiquitous | Lightweight Authentication Scheme with Dynamic Group Members in IoT Environments. | Jheng-Jia Huang, Wen-Shenq Juang, Chun-I Fan, Yi-Fan Tseng, Hiroaki Kikuchi |
| 2015 | AINA | Cryptographic Operation Load-Balancing between Cryptographic Module and CPU. | Yohei Kaneko, Takamichi Saito, Hiroaki Kikuchi |
| 2015 | AINA | Scalability of Privacy-Preserving Linear Regression in Epidemiological Studies. | Hiroaki Kikuchi, Hideki Hashimoto, Hideo Yasunaga, Takamichi Saito |
| 2015 | PST | Zipf distribution model for quantifying risk of re-identification from trajectory data. | Hiroaki Kikuchi, Katsumi Takahashi |
| 2014 | AINA | Privacy-Preserving Hypothesis Testing for the Analysis of Epidemiological Medical Data. | Hiroaki Kikuchi, Tomoki Sato, Jun Sakuma |
| 2014 | HCI | An Accessible CAPTCHA System for People with Visual Disability - Generation of Human/Computer Distinguish Test with Documents on the Net. | Michitomo Yamaguchi, Toru Nakata, Takeshi Okamoto, Hiroaki Kikuchi |
| 2014 | SMC | Vulnerability of the conventional accessible CAPTCHA used by the White House and an alternative approach for visually impaired people. | Michitomo Yamaguchi, Toru Nakata, Hajime Watanabe, Takeshi Okamoto, Hiroaki Kikuchi |
| 2013 | AINA | Privacy-Preserving Distributed Decision Tree Learning with Boolean Class Attributes. | Hiroaki Kikuchi, Kouichi Itoh, Mebae Ushida, Hiroshi Tsuda, Yuji Yamaoka |
| 2013 | DBSEC | Bloom Filter Bootstrap: Privacy-Preserving Estimation of the Size of an Intersection. | Hiroaki Kikuchi, Jun Sakuma |
| 2012 | SAC | Feasibility of a privacy preserving collaborative filtering scheme on the Google App Engine: a performance case study. | Anirban Basu, Jaideep Vaidya, Theo Dimitrakos, Hiroaki Kikuchi |
| 2012 | UIC | Accuracy of Privacy-Preserving Collaborative Filtering Based on Quasi-homomorphic Similarity. | Hiroaki Kikuchi, Yoshiki Aoki, Masayuki Terada, Kazuhiko Ishii, Kimihiko Sekino |
| 2011 | AINA | Perfect Privacy Preserving in Automated Trust Negotiation. | Hiroaki Kikuchi, Tangtisanon Pikulkaew |
| 2011 | CloudCom | Privacy-preserving Collaborative Filtering for the Cloud. | Anirban Basu, Jaideep Vaidya, Hiroaki Kikuchi, Theo Dimitrakos |
| 2011 | SEC | Scalable Privacy-Preserving Data Mining with Asynchronously Partitioned Datasets. | Hiroaki Kikuchi, Daisuke Kagawa, Anirban Basu, Kazuhiko Ishii, Masayuki Terada, Sadayuki Hongo |
| 2010 | AINA | Privacy-Preserving Collaborative Filtering Protocol Based on Similarity between Items. | Minako Tada, Hiroaki Kikuchi, Sutheera Puntheeranurak |
| 2010 | SMC | A discovery of sequential attack patterns of malware in botnets. | Nur Rohman Rosyid, Masayuki Ohrui, Hiroaki Kikuchi, Pitikhate Sooraksa, Masato Terada |
| 2009 | ACSAC | A Study of User-Friendly Hash Comparison Schemes. | Hsu-Chun Hsiao, Yue-Hsun Lin, Ahren Studer, Cassandra Studer, King-Hang Wang, Hiroaki Kikuchi, Adrian Perrig, Hung-Min Sun, Bo-Yin Yang |
| 2009 | IWSEC | A Proposal of Efficient Remote Biometric Authentication Protocol. | Taiki Sakashita, Yoichi Shibata, Takumi Yamamoto, Kenta Takahashi, Wakaha Ogata, Hiroaki Kikuchi, Masakatsu Nishigaki |
| 2008 | AINA | Automated Classification of Port-Scans from Distributed Sensors. | Hiroaki Kikuchi, Naoya Fukuno, Tomohiro Kobori, Masato Terada, Tangtisanon Pikulkaew |
| 2008 | MDAI | Privacy-Preserving Similarity Evaluation and Application to Remote Biometrics Authentication. | Hiroaki Kikuchi, Kei Nagai, Wakaha Ogata, Masakatsu Nishigaki |
| 2007 | AINA | Online and Offline Presence Information Integrated with RFID and Instant Messaging Agent. | Hiroaki Kikuchi, Yuichi Nakamura |
| 2007 | SMC | Evaluation and implement of fuzzy vault scheme using indexed minutiae. | Hiroaki Kikuchi, Yasunori Onuki, Kei Nagai |
| 2006 | AINA | Dual RSA Accumulators and Its Application for Private Revocation Check. | Hiroaki Kikuchi |
| 2006 | WISA | How Many Malicious Scanners Are in the Internet? | Hiroaki Kikuchi, Masato Terada |
| 2005 | AINA | Efficient Key Management Based on the Subset Difference Method for Secure Group Communication. | Yuichi Nakamura, Hiroaki Kikuchi |
| 2005 | AINA | Privacy Preserving Web-Based Questionnaire. | Junji Nakazato, Kenji Fujimoto, Hiroaki Kikuchi |
| 2005 | SMC | Webpage clustering - automated classification into jointly classified groups. | Hiroaki Kikuchi |
| 2005 | WISA | Secure Asymmetric Watermark Detection Without Secret of Modified Pixels. | Mitsuo Okada, Hiroaki Kikuchi |
| 2004 | AINA | Secure Instant Messaging Protocol Preserving Confidentiality against Administrator. | Hiroaki Kikuchi, Minako Tada, Shohachiro Nakanishi |
| 2004 | ATVA | Rabin Tree and Its Application to Group Key Distribution. | Hiroaki Kikuchi |
| 2004 | SEC | ModInt: Compact Modular Arithmatic Class Library Available on Cellular Phone and its Application to Secure Electronic Voting System. | Hiroaki Kikuchi, Junji Nakazato |
| 2001 | FC | (M+1)st-Price Auction Protocol. | Hiroaki Kikuchi |
| 2000 | ICPADS | Distributed auction servers resolving winner and winning bid without revealing privacy of bids. | Hiroaki Kikuchi, Shinji Hotta, Kensuke Abe, Shohachiro Nakanishi |
| 1997 | KES | Fuzzy system identification for composite operation and fuzzy relation by genetic algorithms. | Shinobu Ohtani, Hiroaki Kikuchi, Ronald R. Yager, Shohachiro Nakanishi |