Security Services Using Blockchains: A State of the Art Survey
Tara Salman, Maede Zolanvari, Aiman Erbad, Raj Jain, and Mohammed, Samaka

TL;DR
This survey reviews blockchain-based security services like authentication, confidentiality, privacy, provenance, and integrity, highlighting current techniques, challenges, and how blockchain can address centralized system vulnerabilities.
Contribution
It provides a comprehensive overview of blockchain applications in security services, comparing approaches and discussing challenges to guide future research.
Findings
Blockchain enhances security services by decentralizing control.
Current blockchain approaches face scalability and interoperability challenges.
Blockchain can mitigate risks associated with centralized security management.
Abstract
This article surveys blockchain-based approaches for several security services. These services include authentication, confidentiality, privacy, and access control list (ACL), data and resource provenance, and integrity assurance. All these services are critical for the current distributed applications, especially due to the large amount of data being processed over the networks and the use of cloud computing. Authentication ensures that the user is who he/she claims to be. Confidentiality guarantees that data cannot be read by unauthorized users. Privacy provides the users the ability to control who can access their data. Provenance allows an efficient tracking of the data and resources along with their ownership and utilization over the network. Integrity helps in verifying that the data has not been modified or altered. These services are currently managed by centralized controllers,…
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