BTrust: A New Blockchain-Based Trust Management Protocol for Resource Sharing

Bellaj, Badr; Ouaddah, Aafaf; Bertin, Emmanuel; Crespi, Noël; Mezrioui, Abdellatif; Bellaj, K.

doi:10.1007/s10922-022-09674-4

Cited by 6 publications

(2 citation statements)

References 28 publications

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“…Mohsenzadeh et al proposed a fair consensus model (FRCM) based on computational reputation, which could fairly select transactions of community members while effectively reducing the average response time [17]. Bellaj et al proposed a blockchain-based trust (BTrust) management protocol for resource sharing, which introduced a multidimensional trust and reputation model using multiple weights and parameters to represent the reputation score of individual nodes [18].…”

Section: Related Workmentioning

confidence: 99%

An Improved Byzantine Fault-Tolerant Algorithm Based on Reputation Model

Feng

Liu

2023

Electronics

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This study proposes an improved Byzantine fault-tolerant consensus RB-BFT based on the reputation model to address the problems of low reliability of primary nodes and high communication complexity in the practical Byzantine algorithm (PBFT). First, this algorithm establishes a dynamic reputation model of nodes to distinguish honest and malicious nodes in the system, lowering the likelihood of malicious nodes being chosen as primary nodes and increasing the dependability of primary nodes. Second, the algorithm introduces supervisory nodes for information supervision while reducing the centrality of the system. Finally, this algorithm improves the consistency protocol of the PBFT algorithm by optimizing the process of mutual communication between nodes in the preparation and commitment phases, which reduces the algorithm communication complexity from O(n2) to O(n). Theoretical and practical studies reveal that the RB-BFT algorithm enhances performance and reliability greatly.

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Section: Related Workmentioning

confidence: 99%

An Improved Byzantine Fault-Tolerant Algorithm Based on Reputation Model

Feng

Liu

2023

Electronics

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“…Other works have focused on designing novel access control frameworks specifically tailored for smart contracts and blockchain systems. For instance, decentralized access control systems [9] [10] [6], secure data sharing [11], and healthcare applications [12] have been proposed, showcasing the potential of combining access control and blockchain technology.…”

Section: Access Control Framework Using Smart Contractsmentioning

confidence: 99%

A Transpilation-Based Approach to Writing Secure Access Control Smart Contracts

Bellaj,

Ouaddah,

Crespi

et al. 2023

2023 5th Conference on Blockchain Research &Amp; Applications for Innovative Networks and Services (BRAINS)

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In blockchain space, access control is a crucial aspect of smart contract development, as it guarantees that only authorized users can execute specific functions within a contract. The growing interest in employing smart contracts for access control mechanisms stems from their ability to provide reliable, secure and efficient enforcement of access control policies. However, Solidity, the most popular smart contract language, was not designed explicitly for writing access control policies, unlike specialized languages such as Alfa or XACML. The differences between these languages leads to a difficulty for those who wish to use smart contracts as access control mechanisms but lack the knowledge of Solidity or the ability to evaluate their code's security. To bridge this gap, we introduce ASAC, an Alfa to Solidity transpiler that translates Alfa policies into secure Solidity contracts. Our transpiler leverages the ANTLR (ANother Tool for Language Recognition) parser generator and translate complex Alfa policies into smart contracts. We showcase the effectiveness of our transpiler through a set of case studies and offer an evaluation of its performance.

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