| 2023 | ICISSP | TTP-Aided Searchable Encryption of Documents Using Threshold Secret Sharing. | Ahmad Akmal Aminuddin Mohd Kamal, Keiichi Iwamura |
| 2022 | AsiaCCS | TTP-Aided Secure Computation using Secret Sharing With Only One Computing Server. | Keiichi Iwamura, Ahmad Akmal Aminuddin Mohd Kamal, Masaki Inamura |
| 2021 | ICISSP | Improvement of Secure Multi-Party Multiplication of (k, n) Threshold Secret Sharing Using Only N = k Servers. | Ahmad Akmal Aminuddin Mohd Kamal, Keiichi Iwamura |
| 2021 | ICISSP | Implementation of Secondary Available Digital Content Protection Schemes using Identity-based Signatures. | Nozomi Nagashima, Masaki Inamura, Keiichi Iwamura |
| 2021 | SECRYPT | Secure Computation by Secret Sharing using Input Encrypted with Random Number. | Keiichi Iwamura, Ahmad Akmal Aminuddin Mohd Kamal |
| 2020 | ICISSP | Secure Comparison and Interval Test Protocols based on Three-party MPC. | Wataru Fujii, Keiichi Iwamura, Masaki Inamura |
| 2019 | DASC | Searchable Encryption Using Secret-Sharing Scheme for Multiple Keyword Search Using Conjunctive and Disjunctive Searching. | Ahmad Akmal Aminuddin Mohd Kamal, Keiichi Iwamura |
| 2017 | AINA | Security Evaluation on Secret Computation without Changing the Polynomial Degree. | Ken Aoi, Takeshi Shingu, Keiichi Iwamura |
| 2017 | AINA | Improvement of Communication Traffic and Security of Proactive Secret Sharing Schemes and Combination Proactive Secret Sharing Scheme with an Asymmetric Secret Sharing Scheme. | Naoto Kaneko, Keiichi Iwamura |
| 2017 | PST | Conditionally Secure Multiparty Computation using Secret Sharing Scheme for n < 2k-1 (Short Paper). | Ahmad Akmal Aminuddin Mohd Kamal, Keiichi Iwamura |
| 2016 | AINA | Tightly-Secure Identity-Based Structured Aggregate Signature Scheme under the Computational Diffie-Hellman Assumption. | Tomoya Iwasaki, Naoto Yanai, Masaki Inamura, Keiichi Iwamura |
| 2015 | IWDW | Audio Watermarking Using Different Wavelet Filters. | Toshiki Ito, Hyunho Kang, Keiichi Iwamura, Kitahiro Kaneda, Isao Echizen |
| 2014 | CCS | Watermarking based on the difference of discrete cosine transform coefficients and an error-correcting code. | Hyunho Kang, Keiichi Iwamura |
| 2014 | IWDW | Evaluation of a Zero-Watermarking-Type Steganography. | Hirokazu Ishizuka, Isao Echizen, Keiichi Iwamura, Kouichi Sakurai |
| 2013 | AINA | Experiment of Geometrically Invariant and Unneeded Synchronism Watermarking Using Winding Number. | Hiroki Nishikawa, Yoshio Kakizaki, Keiichi Iwamura, Isao Echizen |
| 2013 | AINA | Secret Sharing Scheme Suitable for Cloud Computing. | Satoshi Takahashi, Keiichi Iwamura |
| 2012 | ISITA | Proposal of a watermarking scheme using winding number and unneeded synchronism. | Hiroki Nishikawa, Yoshio Kakizaki, Keiichi Iwamura |
| 2012 | ISITA | An improvement of insertion/deletion/substitution error correction capabilities of LDPC codes using slide decoding. | Tooru Shigehiro, Hirohisa Yabe, Keiichi Iwamura |
| 2011 | AINA | Selective Encryption Scheme and Mode to Avoid Generating Marker Codes in JPEG2000 Code Streams with Block Cipher. | Hiroki Ikeda, Keiichi Iwamura |
| 2011 | SECRYPT | A New Tree-structure-specified Multisignature Scheme for a Document Circulation System. | Masaki Inamura, Keiichi Iwamura, Ryu Watanabe, Makoto Nishikawa, Toshiaki Tanaka |
| 2010 | ICIP | Scalable authentication for various representations of JPEG 2000 images. | Masafumi Koide, Keiichi Iwamura |
| 1992 | EuroCrypt | High-Speed Implementation Methods for RSA Scheme. | Keiichi Iwamura, Tsutomu Matsumoto, Hideki Imai |
| 1992 | EuroCrypt | Systolic-Arrays for Modular Exponentiation Using Montgomery Method (Extended Abstract). | Keiichi Iwamura, Tsutomu Matsumoto, Hideki Imai |