Departamento de Informática, Universidad de Almería, 04120 Almería, Spain.
Departamento de Lenguajes y Sistemas Informáticos, Universidad de Sevilla, 41012 Sevilla, Spain.
Sensors (Basel). 2020 Dec 14;20(24):7171. doi: 10.3390/s20247171.
The research presented aims to investigate the relationship between privacy and anonymisation in blockchain technologies on different fields of application. The study is carried out through a systematic literature review in different databases, obtaining in a first phase of selection 199 publications, of which 28 were selected for data extraction. The results obtained provide a strong relationship between privacy and anonymisation in most of the fields of application of blockchain, as well as a description of the techniques used for this purpose, such as Ring Signature, homomorphic encryption, k-anonymity or data obfuscation. Among the literature researched, some limitations and future lines of research on issues close to blockchain technology in the different fields of application can be detected. As conclusion, we extract the different degrees of application of privacy according to the mechanisms used and different techniques for the implementation of anonymisation, being one of the risks for privacy the traceability of the operations.
本研究旨在探讨区块链技术在不同应用领域中隐私和匿名化之间的关系。研究通过在不同数据库中进行系统的文献回顾来进行，在第一阶段的选择中获得了 199 篇出版物，其中 28 篇被选作数据提取。所得结果表明，在区块链的大多数应用领域中，隐私和匿名化之间存在很强的关系，并描述了为此目的而使用的技术，如环签名、同态加密、k-匿名或数据混淆。在所研究的文献中，可以发现一些与不同应用领域中区块链技术密切相关的问题的局限性和未来研究方向。作为结论，我们根据所使用的机制和实现匿名化的不同技术，提取出隐私的不同应用程度，其中一个隐私风险是操作的可追溯性。
