A Survey of Blockchain From the Perspectives of Applications, Challenges, and Opportunities

被引：439

作者：

Monrat, Ahmed Afif ^{[1
]}

Schelen, Olov ^{[1
]}

Andersson, Karl ^{[1
]}

机构：

[1] Lulea Univ Technol, Dept Comp Sci Elect & Space Engn, S-93187 Skelleftea, Sweden

来源：

IEEE ACCESS | 2019年 / 7卷

关键词：

Blockchain; distributed ledger; consensus procedures; cryptocurrency; smart contract; selfish mining; energy consumption; BITCOIN; TECHNOLOGY;

D O I：

10.1109/ACCESS.2019.2936094

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

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.

引用

页码：117134 / 117151

页数：18

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