A Truth-Inducing Sybil Resistant Decentralized Blockchain Oracle

Cai, Yuxi; Fragkos, Georgios; Tsiropoulou, Eirini Eleni; Veneris, Andreas

doi:10.1109/brains49436.2020.9223272

Cited by 36 publications

(23 citation statements)

References 15 publications

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“…On the other hand, the extraction of information in the blockchain context is among the issues to which researchers are trying to find solutions to improve supply chain management. Among these solutions, we quote the contribution of [10], which suggests a protocol based on peer prediction with a non-linear scaling system for decentralized oracles to help confidently retrieve external information.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Evaluation of Barriers Influencing Blockchain Implementation in Moroccan Sustainable Supply Chain Management: An Integrated IFAHP-DEMATEL Framework

et al. 2021

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Blockchain technology has received wide attention during recent years, and has huge potential to transform and improve supply chain management. However, its implementation in the SSCM (Sustainable Supply Chain Management) strategy is sophisticated, and the challenges are not explored very well, especially in the Moroccan context. To this end, the chief objective of the current endeavor is to investigate the barriers that hinder the adoption of blockchain technology in SSCM from the Moroccan industry and service sectors’ perspective. Based on a comprehensive literature search and the use of experts’ viewpoints, the barriers affecting the successful implementation of blockchain are classified into three categories called TEO: technological and system, environmental, and intra-organizational dimensions. In this context, a fuzzy group decision-making framework is organized by combining DEMATEL (Decision-Making Trial and Evaluation Laboratory) and IFAHP (Intuitionistic Fuzzy Analytic Hierarchy Process). The IFAHP technique helps to determine the importance/priorities of barriers affecting blockchain adoption, while the DEMATEL technique forms the cause–effect interconnections between these barriers and classifies them concerning the degree of importance and relationships. The results reveal that ‘government policy and support’ and ‘challenges in integrating sustainable practices and blockchain technology through SCM’ are significant adoption barriers of blockchain in Moroccan SSCM. The proposed solution can support industrial decision makers to form flexible short- and long-term decision-making strategies to efficiently manage a sustainable supply chain.

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Section: Introductionmentioning

confidence: 99%

Analysis and Evaluation of Barriers Influencing Blockchain Implementation in Moroccan Sustainable Supply Chain Management: An Integrated IFAHP-DEMATEL Framework

et al. 2021

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“…The aggregator gets compensated for the transaction costs, receives an aggregation reward, and additionally has the chance to win the validation reward with a certain probability. The probability is scaled super-linearly based on the deposited stake to encourage the creation of only one identity [20]. If the aggregator is not lucky and does not win the validation reward, the reward is maintained by the oracle contract until an aggregator gets lucky enough to win the accumulated validation rewards.…”

Section: F Incentive Mechanismmentioning

confidence: 99%

A Voting-Based Blockchain Interoperability Oracle

Sober¹,

Scaffino²,

Spanring³

et al. 2021

Preprint

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Today's blockchain landscape is severely fragmented as more and more heterogeneous blockchain platforms have been developed in recent years. These blockchain platforms are not able to interact with each other or with the outside world since only little emphasis is placed on the interoperability between them. Already proposed solutions for blockchain interoperability such as naive relay or oracle solutions are usually not broadly applicable since they are either too expensive to operate or very resource-intensive.For that reason, we propose a blockchain interoperability oracle that follows a voting-based approach based on threshold signatures. The oracle nodes generate a distributed private key to execute an off-chain aggregation mechanism to collectively respond to requests. Compared to state-of-the-art relay schemes, our approach does not incur any ongoing costs and since the on-chain component only needs to verify a single signature, we can achieve remarkable cost savings compared to conventional oracle solutions.

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“…For this reason, it is the general consensus in the community that Blockchain and DLT systems cannot make calls to external systems/oracles [7,4,11,10,17,15,5,6,18,1,13,12,23,14].…”

Section: The Challengesmentioning

confidence: 99%

“…This is not ideal as it limits parties: (i) to those that are willing to interact and integrate with the specific smart contract/network and bear any costs required to initiate transactions; or (ii) by requiring dApps to make use of external services which become trusted parties themselves. Chainlink [7] is such a trusted party which makes use of decentralised nodes to lower trust issues in single node operators as well as provides a bridge between various data sources and blockchain systems -yet it requires fees to be paid for providing the service 4 .…”

Section: The Challengesmentioning

confidence: 99%

Towards External Calls for Blockchain and Distributed Ledger Technology

Ellul,

Pace

2021

Preprint

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A Truth-Inducing Sybil Resistant Decentralized Blockchain Oracle

Cited by 36 publications

References 15 publications

Analysis and Evaluation of Barriers Influencing Blockchain Implementation in Moroccan Sustainable Supply Chain Management: An Integrated IFAHP-DEMATEL Framework

Analysis and Evaluation of Barriers Influencing Blockchain Implementation in Moroccan Sustainable Supply Chain Management: An Integrated IFAHP-DEMATEL Framework

A Voting-Based Blockchain Interoperability Oracle

Towards External Calls for Blockchain and Distributed Ledger Technology

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