Reliable decentralized oracle with mechanisms for verification and disputation

Limao Ma, Kosuke Kaneko, Subodh Sharma, Kouichi Sakurai

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Smart contract using Blockchain technology provides a mechanism to automatically exchange 'cash' and 'service' according to programmed conditions without requiring reliable third-party intervention. This results in reduction of time and cost for complex contract execution. Some contract execution require external information outside Blockchain as a trigger to execute the code specifying process for a certain contract. However, because Blockchain technology itself does not provide a function to directly access such external information, these applications require a proxy system called 'oracle'. Oracle is in charge accessing external information, to verify it, and to write it on Blockchain. To avoid security incidents such as oracle writing malicious information on Blockchain, reliability of oracle must be required. This paper introduces a decentralized oracle equipping with verification and disputation mechanisms. To evaluate reliability of the proposed mechanisms, a simulation-based experiment was conducted. The experimental results showed that our solution could effectively suppress the interference of malicious participants and obtained reliable consensus results even if relatively many malicious participants joined in the consensus process on the proposed decentralized oracle.

Original languageEnglish
Title of host publicationProceedings - 2019 7th International Symposium on Computing and Networking Workshops, CANDARW 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages346-352
Number of pages7
ISBN (Electronic)9781728152684
DOIs
Publication statusPublished - Nov 2019
Event7th International Symposium on Computing and Networking Workshops, CANDARW 2019 - Nagasaki, Japan
Duration: Nov 26 2019Nov 29 2019

Publication series

NameProceedings - 2019 7th International Symposium on Computing and Networking Workshops, CANDARW 2019

Conference

Conference7th International Symposium on Computing and Networking Workshops, CANDARW 2019
CountryJapan
CityNagasaki
Period11/26/1911/29/19

All Science Journal Classification (ASJC) codes

  • Hardware and Architecture
  • Information Systems
  • Artificial Intelligence
  • Computer Networks and Communications

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  • Cite this

    Ma, L., Kaneko, K., Sharma, S., & Sakurai, K. (2019). Reliable decentralized oracle with mechanisms for verification and disputation. In Proceedings - 2019 7th International Symposium on Computing and Networking Workshops, CANDARW 2019 (pp. 346-352). [8951647] (Proceedings - 2019 7th International Symposium on Computing and Networking Workshops, CANDARW 2019). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/CANDARW.2019.00067