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2020 – today
- 2023
[j15]Keiichi Iwamura, Ahmad Akmal Aminuddin Mohd Kamal
:
Communication-Efficient Secure Computation of Encrypted Inputs Using (k, n) Threshold Secret Sharing. IEEE Access 11: 51166-51184 (2023)- [j14]Ahmad Akmal Aminuddin Mohd Kamal, Keiichi Iwamura:
Privacy preserving multi-party multiplication of polynomials based on (k,n) threshold secret sharing. ICT Express 9(5): 875-881 (2023) - [c90]Ahmad Akmal Aminuddin Mohd Kamal, Keiichi Iwamura:
TTP-Aided Searchable Encryption of Documents Using Threshold Secret Sharing. ICISSP 2023: 442-449 - 2022
- [j13]Keiichi Iwamura, Ahmad Akmal Aminuddin Mohd Kamal:
Simple Approach to Realizing Verifiable Secret Sharing for Secure Cloud System. IEEE Access 10: 76794-76804 (2022) - [j12]Keiichi Iwamura, Ahmad Akmal Aminuddin Mohd Kamal:
TTP-Aided Secure Computation Using (k, n) Threshold Secret Sharing With a Single Computing Server. IEEE Access 10: 120503-120513 (2022) - [j11]Yuma Shibasaki, Keiichi Iwamura, Koya Sato:
A Communication-Efficient Secure Routing Protocol for IoT Networks. Sensors 22(19): 7503 (2022) - [c89]Keiichi Iwamura, Ahmad Akmal Aminuddin Mohd Kamal, Masaki Inamura:
TTP-Aided Secure Computation using Secret Sharing With Only One Computing Server. AsiaCCS 2022: 1243-1245 - [c88]Yuta Kakizaki, Koya Sato, Keiichi Iwamura:
Performance of Federated Learning with Local Differential Privacy: Federation or Individualƒ. CCNC 2022: 737-738 - [c87]Masakazu Okamoto, Koya Sato, Keiichi Iwamura:
A Decentralized Machine Learning Scheme with Input Perturbation-Based Differential Privacy. CCNC 2022: 739-740 - [c86]Nobuyuki Teraura, Isao Echizen, Keiichi Iwamura:
Round Color 2D Symbol with Display Area and Secret Data Area for Business-to-Consumer Applications. GCCE 2022: 793-797 - [c85]Yunosuke Noso, Keiichi Iwamura, Masaki Inamura:
Proposal and Evaluation of a Method for Secure Division Sum Using the Secret Sharing Scheme by Rounding Off Real Numbers. CANDARW 2022: 344-350 - [c84]Sayoko Kakikura, Hyunho Kang, Keiichi Iwamura:
Collusion Resistant Watermarking for Deep Learning Models Protection. ICACT 2022: 40-43 - [c83]Yoshi Michael Cho, Hiroyuki Imada, Naoto Kawamura, Hyunho Kang, Keiichi Iwamura:
Print to Scan Resistant Watermarking based on Green Noise Diffusion Method using Machine Learning. ICACT 2022: 307-312 - [c82]Hiroki Urakawa, Kitahiro Kaneda, Keiichi Iwamura:
Improvement of Privacy Prevented Person Tracking System using Artificial Fiber Pattern. SIGMAP 2022: 78-85 - 2021
- [j10]Ahmad Akmal Aminuddin Mohd Kamal, Keiichi Iwamura:
(Server-Aided) Two-Party Multiplication of Encrypted Shares Using (k, n) Threshold Secret Sharing With N ≥ k Servers. IEEE Access 9: 113117-113129 (2021) - [j9]Ahmad Akmal Aminuddin Mohd Kamal, Keiichi Iwamura:
Searchable encryption using secret sharing scheme that realizes direct search of encrypted documents and disjunctive search of multiple keywords. J. Inf. Secur. Appl. 59: 102824 (2021) - [c81]Yusuke Abe, Kosei Arisaka, Kitahiro Kaneda, Keiichi Iwamura:
A Supply Chain Management System to Prevent Counterfeiting and Trace Different Transactions Instead of using PUF Device. ICE-B 2021: 101-108 - [c80]Ahmad Akmal Aminuddin Mohd Kamal, Keiichi Iwamura:
Improvement of Secure Multi-Party Multiplication of (k, n) Threshold Secret Sharing Using Only N = k Servers. ICISSP 2021: 77-88 - [c79]Nozomi Nagashima, Masaki Inamura, Keiichi Iwamura:
Implementation of Secondary Available Digital Content Protection Schemes using Identity-based Signatures. ICISSP 2021: 485-491 - [c78]Keiichi Iwamura, Ahmad Akmal Aminuddin Mohd Kamal:
Secure Computation by Secret Sharing using Input Encrypted with Random Number. SECRYPT 2021: 540-547 - [c77]Kazuaki Sugai, Kitahiro Kaneda, Keiichi Iwamura:
High-speed Retrieval and Authenticity Judgment using Unclonable Printed Code. SIGMAP 2021: 57-64 - [i5]Ahmad Akmal Aminuddin Mohd Kamal, Keiichi Iwamura:
Improvement of Secure Multi-Party Multiplication of (k, n) Threshold Secret Sharing Using Only N=k Servers (Revised Version). IACR Cryptol. ePrint Arch. 2021: 113 (2021) - [i4]Keiichi Iwamura, Ahmad Akmal Aminuddin Mohd Kamal:
Secure Computation by Secret Sharing Using Input Encrypted with Random Number (Full Paper). IACR Cryptol. ePrint Arch. 2021: 548 (2021) - 2020
- [j8]Keiichi Iwamura:
Foreword. IEICE Trans. Inf. Syst. 103-D(1): 1 (2020) - [c76]Hiroki Ueda, Hyunho Kang, Keiichi Iwamura:
Video Tampering Detection based on High-Frequency Features using Machine Learning. AICCC 2020: 19-24 - [c75]Sayoko Kakikura, Hyunho Kang, Keiichi Iwamura, Naoto Kawamura:
Detecting Discrete Cosine Transform-Based Digital Watermarking Insertion Area Using Deep Learning. AICCC 2020: 25-30 - [c74]Nobuyuki Teraura, Isao Echizen, Keiichi Iwamura:
A QR Symbol with ECDSA for Both Public and Secret Areas using Rhombic Sub-cells. APSIPA 2020: 1392-1399 - [c73]Shogo Ochiai, Keiichi Iwamura, Ahmad Akmal Aminuddin Mohd Kamal:
Secure Pairwise Key Sharing using Geometric Group Key Sharing Method. CCNC 2020: 1-2 - [c72]Yuma Shibasaki, Koya Sato, Keiichi Iwamura:
An AODV-Based Communication-Efficient Secure Routing Protocol for Large Scale Ad-Hoc Networks. CCNC 2020: 1-6 - [c71]Masashi Yamane, Keiichi Iwamura:
Secure and Efficient Outsourcing of Matrix Multiplication based on Secret Sharing Scheme using only One Server. CCNC 2020: 1-6 - [c70]Daiki Yorioka, Hyunho Kang, Keiichi Iwamura:
Data Augmentation For Deep Learning Using Generative Adversarial Networks. GCCE 2020: 516-518 - [c69]Shogo Ochiai, Keiichi Iwamura:
New Approach to Dishonest-Majority Secure Multiparty Computation for Malicious Adversaries when n < 2k - 1. CANDAR (Workshops) 2020: 355-361 - [c68]Tomohiro Kobayashi, Keiichi Iwamura, Masaki Inamura:
A Content Protection Method That Allows Commissioning of Editing Control Processing to a Third Party using a Proxy Signature. ICETE (3) 2020: 98-109 - [c67]Wataru Fujii, Keiichi Iwamura, Masaki Inamura:
Secure Comparison and Interval Test Protocols based on Three-party MPC. ICISSP 2020: 698-704 - [c66]Nobuyuki Teraura, Isao Echizen, Keiichi Iwamura:
Implementation of Digital Signature on QR Symbol by Area Division Using Rhombic Sub-cells. IMIS 2020: 624-638
2010 – 2019
- 2019
- [j7]Keiichi Iwamura:
Foreword. IEICE Trans. Inf. Syst. 102-D(1): 1 (2019) - [c65]Ahmad Akmal Aminuddin Mohd Kamal, Keiichi Iwamura:
Searchable Encryption Using Secret-Sharing Scheme for Multiple Keyword Search Using Conjunctive and Disjunctive Searching. DASC/PiCom/DataCom/CyberSciTech 2019: 149-156 - [c64]Takato Imai, Keiichi Iwamura:
Secret Verification Method Suitable for the Asymmetric Secret Sharing Scheme. ICETE (1) 2019: 178-185 - [c63]Tomohiro Kobayashi, Keiichi Iwamura, Masaki Inamura:
Content Protection Method to Control Editing by Billing. ICETE (1) 2019: 202-214 - [c62]Koki Nishigami, Keiichi Iwamura:
Efficient Geometric Group Key-sharing Scheme. ICETE (1) 2019: 215-220 - [c61]Nobuyuki Teraura, Isao Echizen, Keiichi Iwamura:
Implementation of a Digital Signature in Backward-Compatible QR Codes Using Subcell Division and Double Encoding. IMIS 2019: 466-476 - [i3]Shogo Ochiai, Keiichi Iwamura, Ahmad Akmal Aminuddin Mohd Kamal:
Secure Pairwise Key Sharing using Geometric Group Key Sharing Method (Full Paper). IACR Cryptol. ePrint Arch. 2019: 1258 (2019) - [i2]Keiichi Iwamura, Ahmad Akmal Aminuddin Mohd Kamal:
Fast Secrecy Computation with Multiplication Under the Setting of $k\le N<2k-1$ using Secret Sharing Scheme. IACR Cryptol. ePrint Arch. 2019: 1280 (2019) - 2018
- [c60]Ryohei Niiuchi, Hyunho Kang, Keiichi Iwamura:
Detection of Human Motion Gestures Using Machine Learning for Actual Emergency Situations. GCCE 2018: 492-496 - [c59]Naoya Noguchi, Kitahiro Kaneda, Keiichi Iwamura, Isao Echizen:
New Approach for Embedding Secret Information into Fiber Materials. GCCE 2018: 658-660 - [c58]Koki Nishigami, Keiichi Iwamura:
Geometric Pairwise Key-Sharing Scheme. SecITC 2018: 518-528 - 2017
- [j6]Keiichi Iwamura, Masaki Kawamura, Minoru Kuribayashi, Motoi Iwata, Hyunho Kang, Seiichi Gohshi, Akira Nishimura:
Information Hiding and Its Criteria for Evaluation. IEICE Trans. Inf. Syst. 100-D(1): 2-12 (2017) - [j5]Naoto Yanai, Tomoya Iwasaki, Masaki Inamura, Keiichi Iwamura:
Provably Secure Structured Signature Schemes with Tighter Reductions. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 100-A(9): 1870-1881 (2017) - [c57]Naoto Kaneko, Keiichi Iwamura:
Improvement of Communication Traffic and Security of Proactive Secret Sharing Schemes and Combination Proactive Secret Sharing Scheme with an Asymmetric Secret Sharing Scheme. AINA Workshops 2017: 13-18 - [c56]Ken Aoi, Takeshi Shingu, Keiichi Iwamura:
Security Evaluation on Secret Computation without Changing the Polynomial Degree. AINA Workshops 2017: 56-61 - [c55]Ahmad Akmal Aminuddin Mohd Kamal, Keiichi Iwamura, Hyunho Kang:
Searchable encryption of image based on secret sharing scheme. APSIPA 2017: 1495-1503 - [c54]Jun Hamasaki, Keiichi Iwamura:
Geometric group key-sharing scheme using euclidean distance. CCNC 2017: 1004-1005 - [c53]Masataka Ikeda, Hyunho Kang, Keiichi Iwamura:
Direct challenge ring oscillator PUF (DC-ROPUF) with novel response selection. GCCE 2017: 1-2 - [c52]Daichi Tanaka, Keiichi Iwamura, Masaki Inamura, Kitahiro Kaneda:
Deployment of Contents Protection Scheme using Digital Signature. ICE-B 2017: 130-137 - [c51]Ryo Sakuma, Hyunho Kang, Keiichi Iwamura, Isao Echizen:
Digital Watermarking Scheme Based on Machine Learning for the IHC Evaluation Criteria. IIH-MSP (1) 2017: 370-380 - [c50]Ahmad Akmal Aminuddin Mohd Kamal, Keiichi Iwamura:
Conditionally Secure Multiparty Computation using Secret Sharing Scheme for n < 2k-1 (Short Paper). PST 2017: 225-232 - [i1]Ahmad Akmal Aminuddin Mohd Kamal, Keiichi Iwamura:
Conditionally Secure Secrecy Computation using Secret Sharing Scheme for n<2k-1 (full paper). IACR Cryptol. ePrint Arch. 2017: 718 (2017) - 2016
- [c49]Tomoya Iwasaki, Naoto Yanai, Masaki Inamura, Keiichi Iwamura:
Tightly-Secure Identity-Based Structured Aggregate Signature Scheme under the Computational Diffie-Hellman Assumption. AINA 2016: 669-676 - [c48]Jun Hamasaki, Ryo Kaneko, Keiichi Iwamura:
Geometric group key-sharing scheme. GCCE 2016: 1-2 - [c47]Naoto Kaneko, Keiichi Iwamura:
Proactive secret sharing scheme suitable for asymmetric secret sharing scheme. GCCE 2016: 1-2 - [c46]Natsuki Kokui, Hyunho Kang, Keiichi Iwamura, Isao Echizen:
Best embedding direction for spread spectrum-based video watermarking. GCCE 2016: 1-3 - [c45]Yuichi Kusama, Hyunho Kang, Keiichi Iwamura, Isao Echizen:
Privacy-protected video surveillance in crowded environments using robust watermarking. GCCE 2016: 1-2 - [c44]YuFeng Yan, Hyunho Kang, Keiichi Iwamura, Isao Echizen:
Image watermarking using the differences between two wavelet filters. GCCE 2016: 1-3 - [c43]Takeshi Shingu, Keiichi Iwamura, Kitahiro Kaneda:
Secrecy Computation without Changing Polynomial Degree in Shamir's (K, N) Secret Sharing Scheme. DCNET 2016: 89-94 - [c42]Tatsuya Fujimoto, Keiichi Iwamura, Masaki Inamura:
Content Protection Scheme to Realize Edit Control Including Diversion Control and Composition Control. ICE-B 2016: 116-123 - [c41]Tatsuya Fujimoto, Keiichi Iwamura, Masaki Inamura:
Content Protection Scheme to Realize Edit Control Including Diversion Control and Composition Control. ICETE (Selected Papers) 2016: 124-138 - [c40]Shinichi Goto, Keiichi Iwamura, Yuji Suga, Kitahiro Kaneda:
Secret Sharing Scheme and Key Sharing Scheme Suitable for Clustered Sensor Networks. WINSYS 2016: 172-180 - 2015
- [j4]Hyunho Kang, Keiichi Iwamura:
Information Hiding Method Using Best DCT and Wavelet Coefficients and ItsWatermark Competition. Entropy 17(3): 1218-1235 (2015) - [c39]Hyunho Kang, Keiichi Iwamura:
Anti-counterfeiting Using Irregularities of Magnetic Flux Density. CIT/IUCC/DASC/PICom 2015: 1325-1329 - [c38]Hirokazu Ishizuka, Kouichi Sakurai, Isao Echizen, Keiichi Iwamura:
Evaluation of Matching Accuracy of Template Matching Using a Steganography Algorithm. CANDAR 2015: 457-462 - [c37]Kent Kobayashi, Masaki Inamura, Kitahiro Kaneda, Keiichi Iwamura, Isao Echizen:
Surveillance Camera System Balancing Privacy Protection and Effective Surveillance Image Use. ICE-B 2015: 41-48 - [c36]Katsuma Koga, Masaki Inamura, Kitahiro Kaneda, Keiichi Iwamura:
Content Control Scheme to Realize Right Succession and Edit Control. ICE-B 2015: 249-256 - [c35]Toshiki Ito, Hyunho Kang, Keiichi Iwamura, Kitahiro Kaneda, Isao Echizen:
Audio Watermarking Using Different Wavelet Filters. IWDW 2015: 312-320 - [c34]Yuichi Kusama, Hyunho Kang, Keiichi Iwamura:
Mosaic-based Privacy-protection with Reversible Watermarking. SIGMAP 2015: 98-103 - 2014
- [c33]Hyunho Kang, Keiichi Iwamura:
Watermarking based on the difference of discrete cosine transform coefficients and an error-correcting code. IWIHC@AsiaCCS 2014: 9-17 - [c32]Toshiki Ito, Ryo Sugimura, Hyunho Kang, Keiichi Iwamura, Kitahiro Kaneda, Isao Echizen:
A New Approach to Reversible Watermarking. IIH-MSP 2014: 455-458 - [c31]Hirokazu Ishizuka, Isao Echizen, Keiichi Iwamura, Kouichi Sakurai:
A Zero-Watermarking-Like Steganography and Potential Applications. IIH-MSP 2014: 459-462 - [c30]Kento Kobayashi, Keiichi Iwamura, Kitahiro Kaneda, Isao Echizen:
Surveillance Camera System to Achieve Privacy Protection and Crime Prevention. IIH-MSP 2014: 463-466 - [c29]Hyunho Kang, Keiichi Iwamura:
Image Protection System with Steganography and Authentication. IIH-MSP 2014: 467-470 - [c28]Kitahiro Kaneda, Hiroyasu Kitazawa, Keiichi Iwamura, Isao Echizen:
A Study of Equipment Dependence of a Single-Dot Pattern Method for an Information-Hiding by Applying an Error-Correcting Code. IIH-MSP 2014: 497-501 - [c27]Kitahiro Kaneda, Tomoki Inui, Keiichi Iwamura, Isao Echizen:
Novel Proposal and Evaluation of Information Extraction Method from Artificial Fiber Pattern Using a Camera. IIH-MSP 2014: 502-506 - [c26]Kitahiro Kaneda, Kenta Kawabata, Keiichi Iwamura, Isao Echizen:
Mathematical Simulation Model and Its Evaluation for Artificial Fiber Patterns. IIH-MSP 2014: 507-511 - [c25]Hirokazu Ishizuka, Isao Echizen, Keiichi Iwamura, Kouichi Sakurai:
Evaluation of a Zero-Watermarking-Type Steganography. IWDW 2014: 613-624 - [e1]Keiichi Iwamura, Ki-Ryong Kwon, Seiichi Gohshi, Minoru Kuribayashi:
Proceedings of the 1st international workshop on Information hiding and its criteria for evaluation, IWIHC 2014, Kyoto, Japan, June 3, 2014. ACM 2014, ISBN 978-1-4503-2803-6 [contents] - 2013
- [j3]Masaki Inamura, Keiichi Iwamura:
Content Approval Systems with Expansions of a New Pair-Connected-Structured Aggregate Signature Scheme. Int. J. E Entrepreneurship Innov. 4(2): 15-37 (2013) - [c24]Satoshi Takahashi, Keiichi Iwamura:
Secret Sharing Scheme Suitable for Cloud Computing. AINA 2013: 530-537 - [c23]Hiroki Nishikawa, Yoshio Kakizaki, Keiichi Iwamura, Isao Echizen:
Experiment of Geometrically Invariant and Unneeded Synchronism Watermarking Using Winding Number. AINA Workshops 2013: 877-882 - [c22]Satoshi Takahashi, Shiro Kobayashi, Hyunho Kang, Keiichi Iwamura:
Secret sharing scheme for cloud computing using IDs. GCCE 2013: 528-529 - [c21]Yoshihide Nagai, Hyunho Kang, Keiichi Iwamura:
A storage-saving secret sharing scheme suitable for sensor networks. GCCE 2013: 534-535 - 2012
- [j2]Yoshio Kakizaki, Maeda Kazunari, Keiichi Iwamura:
Identifier Migration for Identity Continuance in Single Sign-On. J. Information Security 3(4): 307-313 (2012) - [c20]Tooru Shigehiro, Hirohisa Yabe, Keiichi Iwamura:
An improvement of insertion/deletion/substitution error correction capabilities of LDPC codes using slide decoding. ISITA 2012: 216-220 - [c19]Hiroki Nishikawa, Yoshio Kakizaki, Keiichi Iwamura:
Proposal of a watermarking scheme using winding number and unneeded synchronism. ISITA 2012: 802-805 - [c18]Hiroki Nishikawa, Shingo Kuse, Keiichi Iwamura, Isao Echizen:
A Method for Resisting Averaging Attacks on Digital Watermarks and Use of This Method with Digital Watermarks. NBiS 2012: 777-781 - 2011
- [c17]Kasumi Toriumi, Yoshio Kakizaki, Keiichi Iwamura:
Fast Implementation of the Advanced Encryption Standard Using Atmega1281. ARES 2011: 342-346 - [c16]Hidetoshi Yukimaru, Yoshio Kakizaki, Keiichi Iwamura:
Key Management Scheme Applicable to Various Topologies of Sensor Networks. ARES 2011: 448-453 - [c15]Hiroki Ikeda, Keiichi Iwamura:
Selective Encryption Scheme and Mode to Avoid Generating Marker Codes in JPEG2000 Code Streams with Block Cipher. AINA Workshops 2011: 593-600 - [c14]Kitahiro Kaneda, Yuta Kito, Keiichi Iwamura:
Information Hiding Based on the Artificial Fiber Pattern with Improved Robustness against Foregound Objects. IIH-MSP 2011: 322-329 - [c13]Kitahiro Kaneda, Yoshiaki Tachibana, Keiichi Iwamura:
Information Hiding Based on a Single Dot Pattern Method with Improved Extraction and Robustness against Foreground Objects. IIH-MSP 2011: 330-335 - [c12]Yoshio Kakizaki, Maeda Kazunari, Keiichi Iwamura:
Identity Continuance in Single Sign-On with Authentication Server Failure. IMIS 2011: 597-602 - [c11]Maeda Kazunari, Yoshio Kakizaki, Keiichi Iwamura:
Identifier Migration in OpenID. IMIS 2011: 612-617 - [c10]Masaki Inamura, Keiichi Iwamura, Ryu Watanabe, Makoto Nishikawa, Toshiaki Tanaka:
A New Tree-structure-specified Multisignature Scheme for a Document Circulation System. SECRYPT 2011: 362-369 - 2010
- [c9]Yoshio Kakizaki, Keiichi Iwamura:
A Consideration of the Reliability of Registration and Attribute Exchange. ARES 2010: 574-579 - [c8]Kitahiro Kaneda, Yuki Fujii, Keiichi Iwamura, Seiichiro Hangai:
An Improvement of Robustness Against Physical Attacks and Equipment Independence in Information Hiding Based on the Artificial Fiber Pattern. ARES 2010: 608-612 - [c7]Hajime Kubota, Keiichi Iwamura:
A New Fragile Watermarking Scheme and Its Security Evaluation. CCNC 2010: 1-5 - [c6]Masafumi Koide, Keiichi Iwamura:
Scalable authentication for various representations of JPEG 2000 images. ICIP 2010: 985-988
2000 – 2009
- 2008
- [c5]Kitahiro Kaneda, Kenji Hirano, Keiichi Iwamura, Seiichiro Hangai:
Information Hiding Method Utilizing Low Visible Natural Fiber Pattern for Printed Documents. IIH-MSP 2008: 319-322 - [c4]Kitahiro Kaneda, Fumiya Nagai, Keiichi Iwamura, Seiichiro Hangai:
A Study of Information Hiding Performance Using Simple Dot Pattern with Different Tile Sizes. IIH-MSP 2008: 323-326 - [c3]Kosuke Kamiya, Takuma Mori, Keiichi Iwamura:
Development of Benchmark Tool for Digital Watermarking. IIH-MSP 2008: 327-330
1990 – 1999
- 1995
- [j1]Keiichi Iwamura, Yasunori Dohi, Hideki Imai:
A Design of Reed-Solomon Decoder with Systolic Array Structure. IEEE Trans. Computers 44(1): 118-122 (1995) - 1992
- [c2]Keiichi Iwamura, Tsutomu Matsumoto, Hideki Imai:
High-Speed Implementation Methods for RSA Scheme. EUROCRYPT 1992: 221-238 - [c1]Keiichi Iwamura, Tsutomu Matsumoto, Hideki Imai:
Systolic-Arrays for Modular Exponentiation Using Montgomery Method (Extended Abstract). EUROCRYPT 1992: 477-481
Coauthor Index