Keiichi Iwamura

113 papers A* 2A 1B 7C 11Journal 22Unranked 69

Year	Rank	Type	Title / Venue / Authors
2025	J	`jnl`	Improving the security of asymmetric secret sharing scheme and its new applications. J. Inf. Secur. Appl. Keiichi Iwamura, Ahmad Akmal Aminuddin Mohd Kamal
2025	J	`jnl`	Secure User Authentication With Information Theoretic Security Using Secret Sharing-Based Secure Computation. IEEE Access Keiichi Iwamura, Ahmad Akmal Aminuddin Mohd Kamal
2023	J	`jnl`	Communication-Efficient Secure Computation of Encrypted Inputs Using (k, n) Threshold Secret Sharing. IEEE Access Keiichi Iwamura, Ahmad Akmal Aminuddin Mohd Kamal
2023	J	`jnl`	Privacy preserving multi-party multiplication of polynomials based on (k,n) threshold secret sharing. ICT Express Ahmad Akmal Aminuddin Mohd Kamal, Keiichi Iwamura
2023	C	`conf`	TTP-Aided Searchable Encryption of Documents Using Threshold Secret Sharing. ICISSP Ahmad Akmal Aminuddin Mohd Kamal, Keiichi Iwamura
2022	J	`jnl`	A Communication-Efficient Secure Routing Protocol for IoT Networks. Sensors Yuma Shibasaki, Keiichi Iwamura, Koya Sato
2022	—	`conf`	A Decentralized Machine Learning Scheme with Input Perturbation-Based Differential Privacy. CCNC Masakazu Okamoto, Koya Sato, Keiichi Iwamura
2022	—	`conf`	Collusion Resistant Watermarking for Deep Learning Models Protection. ICACT Sayoko Kakikura, Hyunho Kang, Keiichi Iwamura
2022	—	`conf`	Improvement of Privacy Prevented Person Tracking System using Artificial Fiber Pattern. SIGMAP Hiroki Urakawa, Kitahiro Kaneda, Keiichi Iwamura
2022	—	`conf`	Performance of Federated Learning with Local Differential Privacy: Federation or Individualƒ. CCNC Yuta Kakizaki, Koya Sato, Keiichi Iwamura
2022	—	`conf`	Print to Scan Resistant Watermarking based on Green Noise Diffusion Method using Machine Learning. ICACT Yoshi Michael Cho, Hiroyuki Imada, Naoto Kawamura, Hyunho Kang, Keiichi Iwamura
2022	—	`conf`	Proposal and Evaluation of a Method for Secure Division Sum Using the Secret Sharing Scheme by Rounding Off Real Numbers. CANDARW Yunosuke Noso, Keiichi Iwamura, Masaki Inamura
2022	—	`conf`	Round Color 2D Symbol with Display Area and Secret Data Area for Business-to-Consumer Applications. GCCE Nobuyuki Teraura, Isao Echizen, Keiichi Iwamura
2022	J	`jnl`	Simple Approach to Realizing Verifiable Secret Sharing for Secure Cloud System. IEEE Access Keiichi Iwamura, Ahmad Akmal Aminuddin Mohd Kamal
2022	J	`jnl`	TTP-Aided Secure Computation Using (k, n) Threshold Secret Sharing With a Single Computing Server. IEEE Access Keiichi Iwamura, Ahmad Akmal Aminuddin Mohd Kamal
2022	A	`conf`	TTP-Aided Secure Computation using Secret Sharing With Only One Computing Server. AsiaCCS Keiichi Iwamura, Ahmad Akmal Aminuddin Mohd Kamal, Masaki Inamura
2021	J	`jnl`	(Server-Aided) Two-Party Multiplication of Encrypted Shares Using (k, n) Threshold Secret Sharing With N ≥ k Servers. IEEE Access Ahmad Akmal Aminuddin Mohd Kamal, Keiichi Iwamura
2021	—	`conf`	A Supply Chain Management System to Prevent Counterfeiting and Trace Different Transactions Instead of using PUF Device. ICE-B Yusuke Abe, Kosei Arisaka, Kitahiro Kaneda, Keiichi Iwamura
2021	—	`conf`	High-speed Retrieval and Authenticity Judgment using Unclonable Printed Code. SIGMAP Kazuaki Sugai, Kitahiro Kaneda, Keiichi Iwamura
2021	C	`conf`	Implementation of Secondary Available Digital Content Protection Schemes using Identity-based Signatures. ICISSP Nozomi Nagashima, Masaki Inamura, Keiichi Iwamura
2021	C	`conf`	Improvement of Secure Multi-Party Multiplication of (k, n) Threshold Secret Sharing Using Only N = k Servers. ICISSP Ahmad Akmal Aminuddin Mohd Kamal, Keiichi Iwamura
2021	J	`jnl`	Improvement of Secure Multi-Party Multiplication of (k, n) Threshold Secret Sharing Using Only N=k Servers (Revised Version). IACR Cryptol. ePrint Arch. Ahmad Akmal Aminuddin Mohd Kamal, Keiichi Iwamura
2021	J	`jnl`	Searchable encryption using secret sharing scheme that realizes direct search of encrypted documents and disjunctive search of multiple keywords. J. Inf. Secur. Appl. Ahmad Akmal Aminuddin Mohd Kamal, Keiichi Iwamura
2021	J	`jnl`	Secure Computation by Secret Sharing Using Input Encrypted with Random Number (Full Paper). IACR Cryptol. ePrint Arch. Keiichi Iwamura, Ahmad Akmal Aminuddin Mohd Kamal
2021	C	`conf`	Secure Computation by Secret Sharing using Input Encrypted with Random Number. SECRYPT Keiichi Iwamura, Ahmad Akmal Aminuddin Mohd Kamal
2020	—	`conf`	A Content Protection Method That Allows Commissioning of Editing Control Processing to a Third Party using a Proxy Signature. ICETE (3) Tomohiro Kobayashi, Keiichi Iwamura, Masaki Inamura
2020	—	`conf`	A QR Symbol with ECDSA for Both Public and Secret Areas using Rhombic Sub-cells. APSIPA Nobuyuki Teraura, Isao Echizen, Keiichi Iwamura
2020	—	`conf`	An AODV-Based Communication-Efficient Secure Routing Protocol for Large Scale Ad-Hoc Networks. CCNC Yuma Shibasaki, Koya Sato, Keiichi Iwamura
2020	—	`conf`	Data Augmentation For Deep Learning Using Generative Adversarial Networks. GCCE Daiki Yorioka, Hyunho Kang, Keiichi Iwamura
2020	—	`conf`	Detecting Discrete Cosine Transform-Based Digital Watermarking Insertion Area Using Deep Learning. AICCC Sayoko Kakikura, Hyunho Kang, Keiichi Iwamura, Naoto Kawamura
2020	J	`jnl`	Foreword. IEICE Trans. Inf. Syst. Keiichi Iwamura
2020	—	`conf`	Implementation of Digital Signature on QR Symbol by Area Division Using Rhombic Sub-cells. IMIS Nobuyuki Teraura, Isao Echizen, Keiichi Iwamura
2020	—	`conf`	New Approach to Dishonest-Majority Secure Multiparty Computation for Malicious Adversaries when n < 2k - 1. CANDAR (Workshops) Shogo Ochiai, Keiichi Iwamura
2020	C	`conf`	Secure Comparison and Interval Test Protocols based on Three-party MPC. ICISSP Wataru Fujii, Keiichi Iwamura, Masaki Inamura
2020	—	`conf`	Secure Pairwise Key Sharing using Geometric Group Key Sharing Method. CCNC Shogo Ochiai, Keiichi Iwamura, Ahmad Akmal Aminuddin Mohd Kamal
2020	—	`conf`	Secure and Efficient Outsourcing of Matrix Multiplication based on Secret Sharing Scheme using only One Server. CCNC Masashi Yamane, Keiichi Iwamura
2020	—	`conf`	Video Tampering Detection based on High-Frequency Features using Machine Learning. AICCC Hiroki Ueda, Hyunho Kang, Keiichi Iwamura
2019	—	`conf`	Content Protection Method to Control Editing by Billing. ICETE (1) Tomohiro Kobayashi, Keiichi Iwamura, Masaki Inamura
2019	—	`conf`	Efficient Geometric Group Key-sharing Scheme. ICETE (1) Koki Nishigami, Keiichi Iwamura
2019	J	`jnl`	Fast Secrecy Computation with Multiplication Under the Setting of $k\le N<2k-1$ using Secret Sharing Scheme. IACR Cryptol. ePrint Arch. Keiichi Iwamura, Ahmad Akmal Aminuddin Mohd Kamal
2019	J	`jnl`	Foreword. IEICE Trans. Inf. Syst. Keiichi Iwamura
2019	—	`conf`	Implementation of a Digital Signature in Backward-Compatible QR Codes Using Subcell Division and Double Encoding. IMIS Nobuyuki Teraura, Isao Echizen, Keiichi Iwamura
2019	—	`conf`	Searchable Encryption Using Secret-Sharing Scheme for Multiple Keyword Search Using Conjunctive and Disjunctive Searching. DASC/PiCom/DataCom/CyberSciTech Ahmad Akmal Aminuddin Mohd Kamal, Keiichi Iwamura
2019	—	`conf`	Secret Verification Method Suitable for the Asymmetric Secret Sharing Scheme. ICETE (1) Takato Imai, Keiichi Iwamura
2019	J	`jnl`	Secure Pairwise Key Sharing using Geometric Group Key Sharing Method (Full Paper). IACR Cryptol. ePrint Arch. Shogo Ochiai, Keiichi Iwamura, Ahmad Akmal Aminuddin Mohd Kamal
2018	—	`conf`	Detection of Human Motion Gestures Using Machine Learning for Actual Emergency Situations. GCCE Ryohei Niiuchi, Hyunho Kang, Keiichi Iwamura
2018	—	`conf`	Geometric Pairwise Key-Sharing Scheme. SecITC Koki Nishigami, Keiichi Iwamura
2018	—	`conf`	New Approach for Embedding Secret Information into Fiber Materials. GCCE Naoya Noguchi, Kitahiro Kaneda, Keiichi Iwamura, Isao Echizen
2017	C	`conf`	Conditionally Secure Multiparty Computation using Secret Sharing Scheme for n < 2k-1 (Short Paper). PST Ahmad Akmal Aminuddin Mohd Kamal, Keiichi Iwamura
2017	J	`jnl`	Conditionally Secure Secrecy Computation using Secret Sharing Scheme for n<2k-1 (full paper). IACR Cryptol. ePrint Arch. Ahmad Akmal Aminuddin Mohd Kamal, Keiichi Iwamura
2017	—	`conf`	Deployment of Contents Protection Scheme using Digital Signature. ICE-B Daichi Tanaka, Keiichi Iwamura, Masaki Inamura, Kitahiro Kaneda
2017	—	`conf`	Digital Watermarking Scheme Based on Machine Learning for the IHC Evaluation Criteria. IIH-MSP (1) Ryo Sakuma, Hyunho Kang, Keiichi Iwamura, Isao Echizen
2017	—	`conf`	Direct challenge ring oscillator PUF (DC-ROPUF) with novel response selection. GCCE Masataka Ikeda, Hyunho Kang, Keiichi Iwamura
2017	—	`conf`	Geometric group key-sharing scheme using euclidean distance. CCNC Jun Hamasaki, Keiichi Iwamura
2017	—	`conf`	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 Naoto Kaneko, Keiichi Iwamura
2017	J	`jnl`	Information Hiding and Its Criteria for Evaluation. IEICE Trans. Inf. Syst. Keiichi Iwamura, Masaki Kawamura, Minoru Kuribayashi, Motoi Iwata, Hyunho Kang, Seiichi Gohshi, Akira Nishimura
2017	J	`jnl`	Provably Secure Structured Signature Schemes with Tighter Reductions. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. Naoto Yanai, Tomoya Iwasaki, Masaki Inamura, Keiichi Iwamura
2017	—	`conf`	Searchable encryption of image based on secret sharing scheme. APSIPA Ahmad Akmal Aminuddin Mohd Kamal, Keiichi Iwamura, Hyunho Kang
2017	—	`conf`	Security Evaluation on Secret Computation without Changing the Polynomial Degree. AINA Workshops Ken Aoi, Takeshi Shingu, Keiichi Iwamura
2016	—	`conf`	Best embedding direction for spread spectrum-based video watermarking. GCCE Natsuki Kokui, Hyunho Kang, Keiichi Iwamura, Isao Echizen
2016	—	`conf`	Content Protection Scheme to Realize Edit Control Including Diversion Control and Composition Control. ICE-B Tatsuya Fujimoto, Keiichi Iwamura, Masaki Inamura
2016	—	`conf`	Content Protection Scheme to Realize Edit Control Including Diversion Control and Composition Control. ICETE (Selected Papers) Tatsuya Fujimoto, Keiichi Iwamura, Masaki Inamura
2016	—	`conf`	Geometric group key-sharing scheme. GCCE Jun Hamasaki, Ryo Kaneko, Keiichi Iwamura
2016	—	`conf`	Image watermarking using the differences between two wavelet filters. GCCE Yufeng Yan, Hyunho Kang, Keiichi Iwamura, Isao Echizen
2016	—	`conf`	Privacy-protected video surveillance in crowded environments using robust watermarking. GCCE Yuichi Kusama, Hyunho Kang, Keiichi Iwamura, Isao Echizen
2016	—	`conf`	Proactive secret sharing scheme suitable for asymmetric secret sharing scheme. GCCE Naoto Kaneko, Keiichi Iwamura
2016	—	`conf`	Secrecy Computation without Changing Polynomial Degree in Shamir's (K, N) Secret Sharing Scheme. DCNET Takeshi Shingu, Keiichi Iwamura, Kitahiro Kaneda
2016	—	`conf`	Secret Sharing Scheme and Key Sharing Scheme Suitable for Clustered Sensor Networks. WINSYS Shinichi Goto, Keiichi Iwamura, Yuji Suga, Kitahiro Kaneda
2016	B	`conf`	Tightly-Secure Identity-Based Structured Aggregate Signature Scheme under the Computational Diffie-Hellman Assumption. AINA Tomoya Iwasaki, Naoto Yanai, Masaki Inamura, Keiichi Iwamura
2015	—	`conf`	Anti-counterfeiting Using Irregularities of Magnetic Flux Density. CIT/IUCC/DASC/PICom Hyunho Kang, Keiichi Iwamura
2015	C	`conf`	Audio Watermarking Using Different Wavelet Filters. IWDW Toshiki Ito, Hyunho Kang, Keiichi Iwamura, Kitahiro Kaneda, Isao Echizen
2015	—	`conf`	Content Control Scheme to Realize Right Succession and Edit Control. ICE-B Katsuma Koga, Masaki Inamura, Kitahiro Kaneda, Keiichi Iwamura
2015	—	`conf`	Evaluation of Matching Accuracy of Template Matching Using a Steganography Algorithm. CANDAR Hirokazu Ishizuka, Kouichi Sakurai, Isao Echizen, Keiichi Iwamura
2015	J	`jnl`	Information Hiding Method Using Best DCT and Wavelet Coefficients and ItsWatermark Competition. Entropy Hyunho Kang, Keiichi Iwamura
2015	—	`conf`	Mosaic-based Privacy-protection with Reversible Watermarking. SIGMAP Yuichi Kusama, Hyunho Kang, Keiichi Iwamura
2015	—	`conf`	Surveillance Camera System Balancing Privacy Protection and Effective Surveillance Image Use. ICE-B Kent Kobayashi, Masaki Inamura, Kitahiro Kaneda, Keiichi Iwamura, Isao Echizen
2014	—	`conf`	A New Approach to Reversible Watermarking. IIH-MSP Toshiki Ito, Ryo Sugimura, Hyunho Kang, Keiichi Iwamura, Kitahiro Kaneda, Isao Echizen
2014	—	`conf`	A Study of Equipment Dependence of a Single-Dot Pattern Method for an Information-Hiding by Applying an Error-Correcting Code. IIH-MSP Kitahiro Kaneda, Hiroyasu Kitazawa, Keiichi Iwamura, Isao Echizen
2014	—	`conf`	A Zero-Watermarking-Like Steganography and Potential Applications. IIH-MSP Hirokazu Ishizuka, Isao Echizen, Keiichi Iwamura, Kouichi Sakurai
2014	C	`conf`	Evaluation of a Zero-Watermarking-Type Steganography. IWDW Hirokazu Ishizuka, Isao Echizen, Keiichi Iwamura, Kouichi Sakurai
2014	—	`conf`	Image Protection System with Steganography and Authentication. IIH-MSP Hyunho Kang, Keiichi Iwamura
2014	—	`conf`	Mathematical Simulation Model and Its Evaluation for Artificial Fiber Patterns. IIH-MSP Kitahiro Kaneda, Kenta Kawabata, Keiichi Iwamura, Isao Echizen
2014	—	`conf`	Novel Proposal and Evaluation of Information Extraction Method from Artificial Fiber Pattern Using a Camera. IIH-MSP Kitahiro Kaneda, Tomoki Inui, Keiichi Iwamura, Isao Echizen
2014	—	`ed.`	Proceedings of the 1st international workshop on Information hiding and its criteria for evaluation, IWIHC 2014, Kyoto, Japan, June 3, 2014 IWIHC@AsiaCCS Keiichi Iwamura, Ki-Ryong Kwon, Seiichi Gohshi, Minoru Kuribayashi
2014	—	`conf`	Surveillance Camera System to Achieve Privacy Protection and Crime Prevention. IIH-MSP Kento Kobayashi, Keiichi Iwamura, Kitahiro Kaneda, Isao Echizen
2014	—	`conf`	Watermarking based on the difference of discrete cosine transform coefficients and an error-correcting code. IWIHC@AsiaCCS Hyunho Kang, Keiichi Iwamura
2013	—	`conf`	A storage-saving secret sharing scheme suitable for sensor networks. GCCE Yoshihide Nagai, Hyunho Kang, Keiichi Iwamura
2013	J	`jnl`	Content Approval Systems with Expansions of a New Pair-Connected-Structured Aggregate Signature Scheme. Int. J. E Entrepreneurship Innov. Masaki Inamura, Keiichi Iwamura
2013	—	`conf`	Experiment of Geometrically Invariant and Unneeded Synchronism Watermarking Using Winding Number. AINA Workshops Hiroki Nishikawa, Yoshio Kakizaki, Keiichi Iwamura, Isao Echizen
2013	B	`conf`	Secret Sharing Scheme Suitable for Cloud Computing. AINA Satoshi Takahashi, Keiichi Iwamura
2013	—	`conf`	Secret sharing scheme for cloud computing using IDs. GCCE Satoshi Takahashi, Shiro Kobayashi, Hyunho Kang, Keiichi Iwamura
2012	—	`conf`	A Method for Resisting Averaging Attacks on Digital Watermarks and Use of This Method with Digital Watermarks. NBiS Hiroki Nishikawa, Shingo Kuse, Keiichi Iwamura, Isao Echizen
2012	C	`conf`	An improvement of insertion/deletion/substitution error correction capabilities of LDPC codes using slide decoding. ISITA Tooru Shigehiro, Hirohisa Yabe, Keiichi Iwamura
2012	J	`jnl`	Identifier Migration for Identity Continuance in Single Sign-On. J. Information Security Yoshio Kakizaki, Maeda Kazunari, Keiichi Iwamura
2012	C	`conf`	Proposal of a watermarking scheme using winding number and unneeded synchronism. ISITA Hiroki Nishikawa, Yoshio Kakizaki, Keiichi Iwamura
2011	C	`conf`	A New Tree-structure-specified Multisignature Scheme for a Document Circulation System. SECRYPT Masaki Inamura, Keiichi Iwamura, Ryu Watanabe, Makoto Nishikawa, Toshiaki Tanaka
2011	B	`conf`	Fast Implementation of the Advanced Encryption Standard Using Atmega1281. ARES Kasumi Toriumi, Yoshio Kakizaki, Keiichi Iwamura
2011	—	`conf`	Identifier Migration in OpenID. IMIS Maeda Kazunari, Yoshio Kakizaki, Keiichi Iwamura
2011	—	`conf`	Identity Continuance in Single Sign-On with Authentication Server Failure. IMIS Yoshio Kakizaki, Maeda Kazunari, Keiichi Iwamura
2011	—	`conf`	Information Hiding Based on a Single Dot Pattern Method with Improved Extraction and Robustness against Foreground Objects. IIH-MSP Kitahiro Kaneda, Yoshiaki Tachibana, Keiichi Iwamura
2011	—	`conf`	Information Hiding Based on the Artificial Fiber Pattern with Improved Robustness against Foregound Objects. IIH-MSP Kitahiro Kaneda, Yuta Kito, Keiichi Iwamura
2011	B	`conf`	Key Management Scheme Applicable to Various Topologies of Sensor Networks. ARES Hidetoshi Yukimaru, Yoshio Kakizaki, Keiichi Iwamura
2011	—	`conf`	Selective Encryption Scheme and Mode to Avoid Generating Marker Codes in JPEG2000 Code Streams with Block Cipher. AINA Workshops Hiroki Ikeda, Keiichi Iwamura
2010	B	`conf`	A Consideration of the Reliability of Registration and Attribute Exchange. ARES Yoshio Kakizaki, Keiichi Iwamura
2010	—	`conf`	A New Fragile Watermarking Scheme and Its Security Evaluation. CCNC Hajime Kubota, Keiichi Iwamura
2010	B	`conf`	An Improvement of Robustness Against Physical Attacks and Equipment Independence in Information Hiding Based on the Artificial Fiber Pattern. ARES Kitahiro Kaneda, Yuki Fujii, Keiichi Iwamura, Seiichiro Hangai
2010	B	`conf`	Scalable authentication for various representations of JPEG 2000 images. ICIP Masafumi Koide, Keiichi Iwamura
2008	—	`conf`	A Study of Information Hiding Performance Using Simple Dot Pattern with Different Tile Sizes. IIH-MSP Kitahiro Kaneda, Fumiya Nagai, Keiichi Iwamura, Seiichiro Hangai
2008	—	`conf`	Development of Benchmark Tool for Digital Watermarking. IIH-MSP Kosuke Kamiya, Takuma Mori, Keiichi Iwamura
2008	—	`conf`	Information Hiding Method Utilizing Low Visible Natural Fiber Pattern for Printed Documents. IIH-MSP Kitahiro Kaneda, Kenji Hirano, Keiichi Iwamura, Seiichiro Hangai
1995	J	`jnl`	A Design of Reed-Solomon Decoder with Systolic Array Structure. IEEE Trans. Computers Keiichi Iwamura, Yasunori Dohi, Hideki Imai
1992	A*	`conf`	High-Speed Implementation Methods for RSA Scheme. EUROCRYPT Keiichi Iwamura, Tsutomu Matsumoto, Hideki Imai
1992	A*	`conf`	Systolic-Arrays for Modular Exponentiation Using Montgomery Method (Extended Abstract). EUROCRYPT Keiichi Iwamura, Tsutomu Matsumoto, Hideki Imai