Results 1 to 10 of about 1,237 (216)
Asynchronous Federated Learning System Based on Permissioned Blockchains [PDF]
Sensors, 2022 The existing federated learning framework is based on the centralized model coordinator, which still faces serious security challenges such as device differentiated computing power, single point of failure, poor privacy, and lack of Byzantine fault ...
Rong Wang
exaly +5 more sources
On the Use of Proof-of-Work in Permissioned Blockchains: Security and Fairness [PDF]
IEEE Access, 2022 In permissioned blockchains, a set of identifiable miners validates transactions and creates new blocks. In scholarship, the proposed solution for the consensus protocol is usually inspired by the Byzantine fault tolerance (BFT) based on voting rather ...
Ivan Malakhov +2 more
exaly +4 more sources
A Challenge-Response Assisted Authorisation Scheme for Data Access in Permissioned Blockchains [PDF]
Sensors, 2020 Permissioned blockchains can be applied for sharing data among permitted users to authorise the data access requests in a permissioned blockchain. A consensus network constructed using pre-selected nodes should verify a data requester’s credentials to ...
Xiaoshuai Zhang +3 more
doaj +4 more sources
A Gateway-based Interoperability Solution for Permissioned Blockchains
2022 XVLIII Latin American Computer Conference (CLEI), 2022 <p>During the last years, interoperability has become one of the main challenges within blockchain research as blockchains increasingly require integration between each other. Indeed, blockchains work by design in silos of information as interoperability is not a native feature.
Guzman Llambías, Raúl Ruggia
exaly +3 more sources
A privacy-preserving design for sharing demand-driven patient datasets over permissioned blockchains and P2P secure transfer [PDF]
PeerJ Computer Science, 2021 Sharing patient datasets curated by health institutions is critical for the advance of monitoring, surveillance and research. However, patient data is sensitive data and it can only be released under certain conditions and with previous explicit consent.
Mercedes Rodriguez-Garcia +2 more
doaj +3 more sources
Transactional properties of permissioned blockchains [PDF]
Software-Intensive Cyber-Physical Systems, 2019 12 pages. This is a pre-print of an article published in SICS Software-Intensive Cyber-Physical Systems.
Ghareeb Falazi +2 more
exaly +3 more sources
A Blockchain Oracle Interoperability Technique for Permissioned Blockchain
IEEE AccessBlockchain interoperability has become an essential requirement for the advancement of blockchain technology in numerous fields. Enterprise organizations are increasingly utilizing permissioned blockchains to manage and store their organizations’ ...
Asma A. Alhussayen +3 more
doaj +2 more sources
An optimized deterministic concurrency control approach for geo-distributed transaction processing on permissioned blockchains [PDF]
Scientific ReportsConcurrency control is crucial for ensuring consistency and isolation in distributed transaction processing. Traditional concurrency control algorithms, such as locking-based protocols, usually suffer from performance degradation due to heavy transaction
Zhibo Han +6 more
doaj +2 more sources
Blockchain: Research and Applications, 2022 Given the availability of several blockchain technologies in permissioned contexts, blockchain application designers have to cope with the increasing complexity of choosing which technology and consensus algorithm best fit a specific use case.
Antonio Corrádi, Vincenzo Di Nicola
exaly +3 more sources
Mitosis: Practically Scaling Permissioned Blockchains [PDF]
Annual Computer Security Applications Conference, 2021 Scalability remains one of the biggest challenges to the adoption of permissioned blockchain technologies for large-scale deployments. Permissioned blockchains typically exhibit low latencies, compared to permissionless deployments -- however at the cost of poor scalability.
Giorgia Azzurra Marson +4 more
openaire +2 more sources