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The University of Electro-Communications  Graduate School of Informatics and Engineering, School of Informatics and Engineering  "Department of Computer and Network Engineering, Cluster II （Emerging Multi-interdisciplinary Engineering）"

Assistant Professor  SANTOSO BAGUS

■ Career National Institute of Advanced Industrial Science and Technology  情報セキュリティ研究センター  特別研究員  2009/04/01-2011/09/29  Agency for Science Technology and Research (A*STAR)  Institute for Infocomm Research  Research Scientist I  2011/10/01-2016/09/29    ■ Academic background 豊田工業高等専門学校  情報工学科  電気通信大学  電気通信学部  情報通信工学科  2003/03/31  Graduated  電気通信大学  電気通信学部  情報通信工学科  Master's program  2005/03/31  Completed  電気通信大学  電気通信学部  情報通信工学科  Doctoral program  2009/03/31  Completed  電気通信大学  電気通信学部  情報通信工学科  Doctoral program  2009/03/31  Completed    ■ Academic degrees 工学博士  電気通信大学  2016/03/21    ■ Outlines of current research Next Generation Security Public Key Cryptographic (PKC) schemes are an essential technology to build secure communication in networks. However, it has been proven that quantum computers can break all current standard PKC schemes, and moreover, the research on developing practical quantum computers has been gaining momentum in recent years. As　countermeasures against the threat from quantum computers, PKC schemes with claims of security against quantum computers have been proposed. However, many of them have flaws such as: (1) impractical due to large implementation costs (computational, storage, or bandwidth), and (2) lacking in concrete security proof against quantum computers. The main goal of my research is to develop a new paradigm based on (1) computational problems in the binary field which are hard even for quantum computers, and (2) a new framework for proving security against quantum computers, to overcome those flaws and then use it to construct new PKC schemes which require small costs for implementation and are equipped with concrete security proof against quantum computers. As application target, we expect that the results of this project can be applied to secure communication between lightweight devices against quantum computers in networks comprising a large variety of devices such as the Internet of Things (IoT).    ■ Current research areas Theory of informatics  Information network  Information security    ■ Research keywords Cryptography  Information Security  Post-Quantum Cryptography    ■ Published papers International conference proceedings, etc.  Yes  Measuring Security of Symmetric Encryption Schemes Against On-the-Fly Side-Channel Key-Recovery Attacks  Joint  Bagus Santoso, Yasutada Oohama, Chunhua Su  Network and System Security - 13th International Conference, NSS 2019  LNCS/ 11928, 3-17  2019/12/15  Paper  Yes  Secrecy Amplification of Distributed Encrypted Sources With Correlated Keys Using Post-Encryption-Compression  Joint  Bagus Santoso and Yasutada Oohama  IEEE Transactions on Information Forensics and Security  14/ 11, 3042-3056  2019/11  Paper  Yes  Information Theoretic Security for Broadcasting of Two Encrypted Sources under Side-Channel Attacks  Joint  Bagus Santoso and Yasutada Oohama  Entropy  21/ 8, 781-  2019/08  Paper  Yes  Secure Broadcasting of Two Encrypted Sources under Side-Channel Attacks  Joint  Bagus Santoso and Yasutada Oohama  IEEE International Symposium on Information Theory, ISIT 2019  2019, 305-309  2019/07/07  URL  Paper  Yes  Information Theoretic Security for Shannon Cipher System under Side-Channel Attacks  Bagus Santoso and Yasutada Oohama  Entropy  21/ 5, 469-  2019/05  View details...   ■ Research presentations Oral presentation for an academic conference  Shannonワンタイムパッド暗号に置ける秘匿性の必要十分条件の再考察  2020 暗号と情報セキュリティシンポジウム  SCIS/ 2020  No  和田一生、バグス　サントソ  2020/01/31  Oral presentation for an academic conference  事前通信モデルにおけるペアリングを用いない集約署名  2020 Symposium on Cryptography and Information Security  SCIS/ 2020  No  竹牟禮　薫、坂井 祐介、Bagus Santoso、花岡 悟一郎、太田 和夫  2020/01/29  Oral presentation for an academic conference  単純な構造をもった公開鍵暗号方式の単純化  2020 暗号と情報セキュリティシンポジウム  SCIS/ 2020  No  上田　大輔、バグス　サントソ  2020/01/28  Oral presentation for an academic conference  Concurrently Secure Identification Schemes Based on the Hardness of Ideal Lattice Problems in all Rings and a General Simulatable Sampling  SYMPOSIUM ON INFORMATION THEORY AND ITS APPLICATIONS (SITA) 2019  SITA/ 2019  No  Kaoru Takemure, Bagus Santoso  2019/12/26  Oral presentation for an academic conference  LWE暗号の計算機における安全性評価  SYMPOSIUM ON INFORMATION THEORY AND ITS APPLICATIONS (SITA) 2019  SITA/ 2019  No  荒井嵩博、バグス サントソ  2019/01/24  View details...   ■ Grants-in-aid for scientific research New Paradigm to Construct Public Key Cryptographic Schemes for Lightweight Devices with Provable Security against Quantum Attackers  "Scientific research (C), general"  2018/04/01-2022/03/31  Public Key Cryptographic (PKC) schemes are an essential technology to build secure communication in networks. However, it has been proven that quantum computers can break all current standard PKC schemes, and moreover, the research on developing practical quantum computers has been gaining momentum in recent years. The main goal of this proposed research is to develop a new paradigm based on (1) computational problems in the binary field which are hard even for quantum computers, and (2) a new framework for proving security against quantum computers, to overcome those flaws and then use it to construct new PKC schemes which require small costs for implementation and are equipped with concrete security proof against quantum computers. As application target, we expect that the results of this project can be applied to secure communication between lightweight devices against quantum computers in networks comprising a large variety of devices such as the Internet of Things (IoT).  IoT社会の高度化に必要な多端子情報理論と暗号理論を柱とした安全通信理論の構築  2018/04/01-2023/03/31  IoTの急速な進歩により，悪意を持った第三者（以後敵と記す）のハードウェア攻撃とよばれる暗号系への物理的アクセスが高度化かつ多様化し，秘密情報漏えいの危険性が著しく増大している．本研究は，この問題の根本的解決に挑む．具体的には多端子情報理論と暗号理論を基盤として IoT 環境下での情報漏えいの理論的モデルを構築する．このモデルに基づき，敵から想定される最大級の攻撃を受けた場合も，既存暗号系を変更せずに秘密情報の漏れを防止し，安全通信を維持できるための理論的条件と維持の具体的方法とを与える．理論結果の導出では，研究代表者が開発した独自の手法を更に発展させた手法を用いる．また，理論の検証と実用化への見通しを目的として，IoT 環境下における暗号通信系を実システムあるいは計算機上の仮想システムとして実現して通信実験を行う．  View details...   ■ Memberships of academic societies The Institute of Electrical and Electronics Engineers, Inc. (IEEE)  2016/04/01-Present  Association of Computing Machinery (ACM)  2016/04/01-Present  International Association for Cryptologic Research (IACR)  2006/02/16-Present  Institute of Electronics, Information and Communication Engineers (IEICE)  2005/04/01-Present  View details...   ■ Involvement in conference and research meetings 第41回情報理論とその応用シンポジウム(SITA2018)  プログラム委員  2018/12/18  View details...