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2018 Fiscal Year Final Research Report

Study on Applications of Block-chain as Distributed Algorithms

Research Project

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Project/Area Number 16K12425
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Information network
Research InstitutionNational Institute of Informatics

Principal Investigator

Satoh Ichiro  国立情報学研究所, 情報社会相関研究系, 教授 (80282896)

Project Period (FY) 2016-04-01 – 2019-03-31
Keywords分散アルゴリズム / ブロックチェイン / 分散同意問題
Outline of Final Research Achievements

Blockchain is the core technology of existing electric currency systems, e.g., Bitcoin, was studied on the assumption that there were possibilities as general-purpose technologies of distributed systems in addition to their intial target, virtual currency. In this research, we systematically organized whether the functional requirements in the distributed algorithm can be solved by the function of the bitcoin implementation technology, and clarified the method to realize the representative distributed algorithm with the bitcoin technology. When using Bitcoin implementation technology as a distributed algorithm implementation technology, there is directions for modification among bitcoin implementation technologies because the virtual currency and the distribution algorithm have different technical requirements.

Free Research Field

分散システム

Academic Significance and Societal Importance of the Research Achievements

本研究により、ブロックチェインにより実現できる分散同意により、分散相互排除やリーダ選出など、複数コンピュータの同一情報を保持することが求められる分散アルゴリズムを実現できることがわかった。しかし、ブロックチェインが必要となるPoWは従来の分散アルゴリズムには負担を分散システムに求めること、ブロックチェインで実現できる分散アルゴリズムは多数ある一方、ブロックチェイン以外では実現できない、または実現が困難となる分散アルゴリズムは見いだせないことも明らかになった。

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Published: 2020-03-30  

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