Trustworthy blockchain oracles: review, comparison, and open research challenges

H Al-Breiki, MHU Rehman, K Salah… - IEEE access, 2020 - ieeexplore.ieee.org
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 …

Overview of blockchain oracle research

G Caldarelli - Future Internet, 2022 - mdpi.com
Whereas the use of distributed ledger technologies has previously been limited to
cryptocurrencies, other sectors—such as healthcare, supply chain, and finance—can now …

A reinforcement learning model for the reliability of blockchain oracles

M Taghavi, J Bentahar, H Otrok, K Bakhtiyari - Expert Systems with …, 2023 - Elsevier
Smart contracts struggle with the major limitation of operating on data that is solely residing
on the blockchain network. The need of recruiting third parties, known as oracles, to assist …

Proof of witness presence: Blockchain consensus for augmented democracy in smart cities

E Pournaras - Journal of Parallel and Distributed Computing, 2020 - Elsevier
Smart Cities evolve into complex and pervasive urban environments with a citizens'
mandate to meet sustainable development goals. Repositioning democratic values of …

CCIO: a cross-chain interoperability approach for consortium blockchains based on oracle

S Lu, J Pei, R Zhao, X Yu, X Zhang, J Li, G Yang - Sensors, 2023 - mdpi.com
Cross-chain interoperability can expand the ability of data interaction and value circulation
between different blockchains, especially the value interaction and information sharing …

Decentralized on-chain data access via smart contracts in Ethereum blockchain

MS Chishti, F Sufyan, A Banerjee - IEEE Transactions on …, 2021 - ieeexplore.ieee.org
Smart contracts in Ethereum blockchain network are self-executable scripts used for
managing tokenized assets and access rights between different entities on the blockchain …

Blockchain-enabled real-time SLA monitoring for cloud-hosted services

KM Khan, J Arshad, W Iqbal, S Abdullah, H Zaib - Cluster Computing, 2022 - Springer
Cloud computing is an important technology for businesses and individual users to obtain
computing resources over the Internet on-demand and flexibly. Although cloud computing …

Decentralized news-retrieval architecture using blockchain technology

A Alexandrescu, CN Butincu - Mathematics, 2023 - mdpi.com
Trust is a critical element when it comes to news articles, and an important problem is how to
ensure trust in the published information on news websites. First, this paper describes the …

Accountable clouds through blockchain

M Zichichi, G D'Angelo, S Ferretti, M Marzolla - IEEE Access, 2023 - ieeexplore.ieee.org
We present a solution for accountability in Cloud infrastructures based on blockchain. We
show that, through smart contracts, it is possible to create an unforgeable log that can be …

Incentive mechanism design for mitigating frontrunning and transaction reordering in decentralized exchanges

DM Doe, J Li, N Dusit, L Wang, Z Han - IEEE Access, 2023 - ieeexplore.ieee.org
Decentralized exchanges (DEXes) provide effective price discovery and fair trading while
dealing with the drawbacks of centralized exchanges, eg, lack of transaction transparency …