BlockU: Extended usage control in and for Blockchain

dc.contributor.authorKhan, Yasar
dc.contributor.authorAli, Toqeer
dc.contributor.authorFariz, Megat
dc.contributor.authorBranco, Frederico
dc.contributor.authorMartins, José
dc.contributor.authorGonçalves, Ramiro
dc.contributor.authorMoreira, Fernando
dc.date.accessioned2021-04-19T16:29:19Z
dc.date.available2021-04-19T16:29:19Z
dc.date.issued2020
dc.description.abstractAn electronic business transaction among untrusted bodies without consulting a mutually trusted party has remained widely accepted problem. Blockchain resolves this problem by introducing peer-to-peer network with a consensus algorithm and trusted ledger. Blockchain originally introduced for cryptocurrency that came with proof-of-work consensus algorithm. Due to some performance issues, scientists brought concept of permissioned Blockchain. Hyperledger Fabric is a permissioned Blockchain targeting business-oriented problems for industry. It is designed for efficient transaction execution over Blockchain with pluggable consensus model; however, there is limitation of rapid application development. Hyperledger introduced a new layer called Hyperledger Composer on top of the Fabric layer, which provides an abstract layer to model the business application readily and quickly. Composer provides a smart contract to extend the functionality and flexibility of Fabric layer and provides a way of communication with other systems to meet business requirements. Hyperledger Composer uses role-based access control (RBAC) model to secure access to its valuable assets. However, RBAC is not enough because many business deals require continuous assets monitoring. Our proposed model, BlockU, covers all possible access control models required by a business. BlockU can monitor assets continuously during transactions and updates attributes accordingly. Moreover, we incorporate hooks in Hyperledger Composer to implement extended permission model that provides extensive permission management capability on an asset. Subsequently, our proposed enhanced access control model is implemented with a minimal change to existing Composer code base and is backward compatible with the current security mechanism.pt_PT
dc.identifier.citationKhan, Y., Ali, T., Fariz, M., et al. (2020). BlockU: Extended usage control in and for Blockchain. Expert Systems, 1-12. doi: 10.1111/exsy.12507. Disponível no Repositório UPT, http://hdl.handle.net/11328/3436pt_PT
dc.identifier.doi10.1111/exsy.12507pt_PT
dc.identifier.issn0266-4720 (Print)
dc.identifier.issn1468-0394 (Online)
dc.identifier.urihttp://hdl.handle.net/11328/3436
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherJohn Wiley & Sonspt_PT
dc.rightsrestricted accesspt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectFabricpt_PT
dc.subjectHyperledger Composerpt_PT
dc.subjectPermissioned Blockchainpt_PT
dc.subjectUCONpt_PT
dc.titleBlockU: Extended usage control in and for Blockchainpt_PT
dc.typejournal articlept_PT
degois.publication.firstPage1pt_PT
degois.publication.lastPage12pt_PT
degois.publication.titleExpert Systemspt_PT
dspace.entity.typePublicationen
person.affiliation.nameUniversidade Portucalense
person.familyNameMoreira
person.givenNameFernando
person.identifier.ciencia-id7B1C-3A29-9861
person.identifier.orcid0000-0002-0816-1445
person.identifier.ridP-9673-2016
person.identifier.scopus-author-id8649758400
relation.isAuthorOfPublicationbad3408c-ee33-431e-b9a6-cb778048975e
relation.isAuthorOfPublication.latestForDiscoverybad3408c-ee33-431e-b9a6-cb778048975e

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