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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.
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Ahmed Afif Monrat
Luleå University of Technology
Olov Schelén
Luleå University of Technology
Karl Andersson
Luleå University of Technology
IEEE Access
Luleå University of Technology
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Monrat et al. (Tue,) studied this question.
synapsesocial.com/papers/6a08b7679a6c4ba6e610d12d — DOI: https://doi.org/10.1109/access.2019.2936094
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