A survey on privacy protection in blockchain system

By Qi Feng, De-biao He, Sherali Zeadally, Muhammad Khurram Khan, Neeraj Kumar. Journal of Network and Computer Applications, 2019

679 citations recorded by the source corpus.

Abstract Blockchain, as a decentralized and distributed public ledger technology in peer-to-peer network, has received considerable attention recently. It applies a linked block structure to verify and store data, and applies the trusted consensus mechanism to synchronize changes in data, which makes it possible to create a tamper-proof digital platform for storing and sharing data. It is believed that blockchain can be utilized in diverse Internet interactive systems (e.g., Internet of Things, supply chain systems, identity management, and so on). However, there are some privacy challenges that may hinder the applications of blockchain. The goal of this survey is to provide some insights into the privacy issues associated with blockchain. We analyze the privacy threats in blockchain and discuss existing cryptographic defense mechanisms, i.e., anonymity and transaction privacy preservation. Furthermore, we summarize some typical implementations of privacy preservation mechanisms in blockchain and explore future research challenges that still need to be addressed in order to preserve privacy when blockchain is used.

Subfields: Artificial Intelligence, Computer Vision and Pattern Recognition, Information Systems

View Paper: https://www.semanticscholar.org/paper/7ed5b85fae26340e962a45db07643c098cc4765b

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Artificial Intelligence

In Computer Vision and Pattern Recognition

In Information Systems

Citations in the corpus

The Roadmap to 6G Security and Privacy (2021, background): “Some of the blockchain nodes may follow the strict privacy roles and support too much transparency which may leads to reveal some sensitive information such as trade secrets and pricing information [86].”
Applications of blockchain in ensuring the security and privacy of electronic health record systems: A survey (2020, neutral): “We will now introduce the fundamental building blocks in the blockchain ( Feng et al., 2019; Lin et al., 2020; Ma et al., 2020 ).”
Blockchain for Industry 4.0: A Comprehensive Review (2020, background): “For example, Authors of [10] illustrated that how blockchain technology can be used to deal with privacy & security issues in Industry 4.0 [11].”
A Survey on Blockchain Technology: Evolution, Architecture and Security (2021, background): “Therefore, the main challenge is balancing the privacy and security of an individual and accountability [163].”
Blockchain Meets Cloud Computing: A Survey (2020, result): “…has rarely addressed by prior survey studies, even though some recent studies surveyed blockchain techniques in different perspectives, e.g., digital currencies [20]–[22], security [23], [24], privacy [21], [25], edge-integration [26], IoT-integration [27], [28], and smart city-integration [29].”
When Blockchain Meets Supply Chain: A Systematic Literature Review on Current Development and Potential Applications (2020, background): “Later, research interests moved toward the discussion of blockchain system design [89], security and privacy issues [90]–[93], credit evaluation [94], and governance [95], [96].”
Blockchain technology in agri-food value chain management: A synthesis of applications, challenges and future research directions (2019, background): “Therefore, many efforts for protecting privacy in blockchain has been done such as obfuscation on the transaction relationships to prevent linking or tracing analysis, hiding the identifies of the sender and the receiver through complicated cryptographic schemes, and blinding the transaction content”
Survey on blockchain based smart contracts: Applications, opportunities and challenges (2021, background): “[24] A Survey on Privacy Protection in Blockchain System: A comprehensive survey on the privacy protection including identity management.”
Privacy-Preserving Solutions for Blockchain: Review and Challenges (2019, background): “There is another recent survey about privacy in blockchains [31], but, unlike this paper, they did not identify the privacy-related challenges, and the threats they cover are exclusively related”
A Survey on Blockchain for Big Data: Approaches, Opportunities, and Future Directions (2020, background): “Privacy and security issues of blockchain systems were reviewed in [12–15].”