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Blockchains, Volume 1, Issue 2 (December 2023) – 4 articles

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21 pages, 688 KiB  
Review
Web3: Exploring Decentralized Technologies and Applications for the Future of Empowerment and Ownership
by Yiwei Lai, Jingyi Yang, Mingzhe Liu, Yibei Li and Shanlin Li
Blockchains 2023, 1(2), 111-131; https://doi.org/10.3390/blockchains1020008 - 11 Dec 2023
Viewed by 3347
Abstract
The emergence of the World Wide Web has revolutionized online communication, aiming to achieve global information sharing and communication. However, the current Web 2.0 architecture, which relies on centralized platforms, presents limitations such as restricted user rights, data privacy concerns, and dependence on [...] Read more.
The emergence of the World Wide Web has revolutionized online communication, aiming to achieve global information sharing and communication. However, the current Web 2.0 architecture, which relies on centralized platforms, presents limitations such as restricted user rights, data privacy concerns, and dependence on centralized institutions. Web3, as a concept describing the next evolutionary stage of the internet, offers a solution to these issues by reshaping the internet infrastructure. Web3 provides a foundation for autonomous digital experiences and drives the advancement of the digital economy. This paper offers a thorough exploration of Web3, covering its key technologies, applications, challenges, and opportunities. We begin by introducing the core technologies behind Web3, followed by an exploration of its prominent applications. Finally, we analyze the challenges faced by Web3 and discuss potential research opportunities to address these challenges in the future. In summary, this study comprehensively elaborates on Web3 and lays a solid foundation for subsequent research work, encouraging researchers to explore new frontiers. Full article
(This article belongs to the Special Issue Feature Papers in Blockchains)
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21 pages, 4706 KiB  
Review
Bitcoin and Renewable Energy Mining: A Survey
by Yusuke Tomatsu and Wenlin Han
Blockchains 2023, 1(2), 90-110; https://doi.org/10.3390/blockchains1020007 - 7 Dec 2023
Cited by 1 | Viewed by 1028
Abstract
Bitcoin, the most valuable and energy-consuming cryptocurrency, has recently been at the center of a heated debate over its environmental impact. This controversy has caught the public’s attention, prompting us to investigate the energy consumption of Bitcoin. In this paper, we have conducted [...] Read more.
Bitcoin, the most valuable and energy-consuming cryptocurrency, has recently been at the center of a heated debate over its environmental impact. This controversy has caught the public’s attention, prompting us to investigate the energy consumption of Bitcoin. In this paper, we have conducted a review of the literature on various aspects of Bitcoin mining, including its mechanisms, energy consumption, mining sites, and the potential for renewable energy use. Our findings reveal that the power consumption of Bitcoin is bound to increase with the continued adoption of the proof-of-work (PoW) consensus algorithm. Nonetheless, the growing availability of affordable renewable energy sources worldwide brings hope that Bitcoin mining will shift towards cleaner energy in the near future. Full article
(This article belongs to the Special Issue Feature Papers in Blockchains)
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17 pages, 2423 KiB  
Review
Blockchain and Healthcare: A Critical Analysis of Progress and Challenges in the Last Five Years
by Hamed Taherdoost
Blockchains 2023, 1(2), 73-89; https://doi.org/10.3390/blockchains1020006 - 8 Nov 2023
Cited by 4 | Viewed by 2959
Abstract
Utilizing the fundamental characteristics of the decentralization, immutability, and transparency of blockchain technology, the healthcare industry has made notable advancements in incorporating it over the past five years. This review examines the progress and challenges encountered in this critical study by assessing 124 [...] Read more.
Utilizing the fundamental characteristics of the decentralization, immutability, and transparency of blockchain technology, the healthcare industry has made notable advancements in incorporating it over the past five years. This review examines the progress and challenges encountered in this critical study by assessing 124 articles published by MDPI between 2018 and the current date. Examining blockchain’s potential uses, like safe data exchange and interoperability in supply chain management and electronic health records, provides exciting new directions for the future of healthcare. Blockchain technology can greatly increase efficiency and cost-effectiveness by guaranteeing data integrity, protecting patient privacy, and reducing administrative procedures. This paper objectively evaluates blockchain’s advancement in healthcare through a thorough analysis of real-world applications and research projects. By highlighting both its advantages and disadvantages, this analysis seeks to add to the continuing conversation about how blockchain will influence the way healthcare is managed and delivered in the future. Full article
(This article belongs to the Special Issue Feature Papers in Blockchains)
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15 pages, 2054 KiB  
Review
Blockchain Technology Application in Security: A Systematic Review
by Nazanin Moosavi and Hamed Taherdoost
Blockchains 2023, 1(2), 58-72; https://doi.org/10.3390/blockchains1020005 - 29 Oct 2023
Viewed by 4033
Abstract
Blockchain technology is a promising technology that attracts popularity among researchers. However, it was first introduced with digital currencies, particularly Bitcoin, but nowadays, it is also known as one of the most frequently used techniques for securing networks. This systematic review research identifies [...] Read more.
Blockchain technology is a promising technology that attracts popularity among researchers. However, it was first introduced with digital currencies, particularly Bitcoin, but nowadays, it is also known as one of the most frequently used techniques for securing networks. This systematic review research identifies studies that use blockchain for their security challenges. In addition, different fields in blockchain usage, blockchain categorization type, consensus mechanism, smart contract usage, and integration with other software-based algorithms are also investigated. Our results maintain that the Internet of Things (IoT) is the main field in which blockchain provides security. Full article
(This article belongs to the Special Issue Feature Papers in Blockchains)
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