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Survey of Blockchain from the Perspectives of Applications, Challenges and Opportunities
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.ORCID iD: 0000-0001-9801-7625
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.ORCID iD: 0000-0002-4031-2872
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.ORCID iD: 0000-0003-0244-3561
2019 (English)In: IEEE Access, E-ISSN 2169-3536, Vol. 7, p. 117134-117154Article in journal (Refereed) Published
Abstract [en]

Blockchain is the underlying technology of a number of digital cryptocurrencies. Blockchain is a chain of blocks that store information with digital signatures in a decentralized and distributed network. The features of blockchain, including decentralization, immutability, transparency and auditability, make transactions more secure and tamper proof. Apart from cryptocurrency, blockchain technology can be used in financial and social services, risk management, healthcare facilities, and so on. A number of research studies focus on the opportunity that blockchain provides in various application domains. This paper presents a comparative study of the tradeoffs of blockchain and also explains the taxonomy and architecture of blockchain, provides a comparison among different consensus mechanisms and discusses challenges, including scalability, privacy, interoperability, energy consumption and regulatory issues. In addition, this paper also notes the future scope of blockchain technology.

Place, publisher, year, edition, pages
IEEE, 2019. Vol. 7, p. 117134-117154
Keywords [en]
blockchain, distributed ledger, consensus procedures, cryptocurrency, smart contract, selfish mining, energy consumption.
National Category
Computer Sciences Media and Communication Technology
Research subject
Pervasive Mobile Computing
Identifiers
URN: urn:nbn:se:ltu:diva-75553DOI: 10.1109/ACCESS.2019.2936094ISI: 000484305100003OAI: oai:DiVA.org:ltu-75553DiVA, id: diva2:1343319
Projects
Cloudberry Datacenters
Funder
Swedish Energy Agency, 43090-2
Note

Validerad;2019;Nivå 2;2019-09-24 (johcin)

Available from: 2019-08-16 Created: 2019-08-16 Last updated: 2019-09-24Bibliographically approved

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