Security Evaluation Methods in Trust Infrastructure Based on Engineering and Economics

2023 Fiscal Year Final Research Report

• Project/Area Number: 17KT0081
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Multi-year Fund
• Section: 特設分野
• Research Field: The Information Society and Trust
• Research Institution: The University of Tokyo
• Principal Investigator: Matsuura Kanta 東京大学, 生産技術研究所, 教授 (00292756)
• Project Period (FY): 2017-07-18 – 2024-03-31
• Keywords: ブロックチェーン / トラスト基盤 / 暗号通貨 / 高機能暗号 / プライバシー保護 / セキュリティ経済学

Outline of Final Research Achievements

In this project, we developed security evaluation methods in trust infrastructure from the viewpoints of both engineering and economics based on advanced but harmonized adversarial models. As planned, we obtained many implications for blockchain applications. In particular, as a generic implication related to all of the research items in this project, we found that the randomness source (e.g. a nonce in a DL-based digital signature) can be used for an adaptive stochastic process in the economic token models. In addition, it can be used as a Proof-of-Verification (PoV) which shows that someone certainly verified and validated the newly reported block. PoV is currently studied in a subsequent project on energy-efficient implementation of public blockchains towards better social acceptability.

Free Research Field

情報セキュリティ

Academic Significance and Societal Importance of the Research Achievements

工学的研究では、高機能暗号技術に関して、とくに学術的意義の高い成果を得た。すなわち、ブロックチェーン上で実装した時にモデルが整合し、安全性の再評価をせず利用できる道を開いた。実際、主要な国内会議で学生論文賞を受賞し、主要な国際会議に２編採録され、うち１編は最優秀論文賞を受賞した。経済学的研究では、ブロックチェーンの消費電力を削減して社会受容性を高める研究へと発展する知見を得た。実際、社会的意義を第一に目指す後継プロジェクトがスタートしている。