Quotation Al-Breiki, Hamda, Rehman, Muhammad Habib Ur, Salah, Khaled, Svetinovic, Davor. 2020. Trustworthy Blockchain Oracles: Review, Comparison, and Open Research Challenges. IEEE Access. 8 85675-85685.


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Abstract

The essence of blockchain smart contracts lies in the execution of business logic code in a decentralized architecture in which the execution outcomes are trusted and agreed upon by all the executing nodes. Despite the decentralized and trustless architectures of the blockchain systems, smart contracts on their own cannot access data from the external world. Instead, smart contracts interact with off-chain external data sources, called oracles, whose primary job is to collect and provide data feeds and input to smart contracts. However, there is always risk of oracles providing corrupt, malicious, or inaccurate data. In this paper, we analyze and present the notion of trust in the oracles used in blockchain ecosystems. We analyze and compare trust-enabling features of the leading blockchain oracle approaches, techniques, and platforms. Moreover, we discuss open research challenges that should be addressed to ensure secure and trustworthy blockchain oracles.

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Publication's profile

Status of publication Published
Affiliation External
Type of publication Journal article
Journal IEEE Access
Citation Index SCI
Language English
Title Trustworthy Blockchain Oracles: Review, Comparison, and Open Research Challenges
Volume 8
Year 2020
Page from 85675
Page to 85685
Reviewed? Y
URL http://xplorestaging.ieee.org/ielx7/6287639/8948470/09086815.pdf?arnumber=9086815
DOI http://dx.doi.org/10.1109/access.2020.2992698
Open Access Y
Open Access Link https://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=9086815

Associations

People
Svetinovic, Davor (Details)
External
Al-Breiki, Hamda (Electrical Engineering and Computer Science Khalifa University of Science and Technology, United Arab Emirates)
Rehman, Muhammad Habib Ur (Center for Cyber-Physical Systmems, Khalifa University of Science and Technology, Abu Dhabi, UAE, United Arab Emirates)
Salah, Khaled (Center for Cyber-Physical Systmems, Khalifa University of Science and Technology, Abu Dhabi, UAE, United Arab Emirates)
Organization
Information Systems and Operations Management DP (Details)
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