NIST has published NIST
Internal Report (NIST IR) 8403, Blockchain for
Access Control Systems. Protecting system resources
against unauthorized access is the primary objective of an access control
system. As information systems rapidly evolve, the need for advanced access
control mechanisms that support decentralization, scalability, and trust – all
major challenges for traditional mechanisms – has grown.
Blockchain technology offers high confidence and tamper resistance
implemented in a distributed fashion without a central authority, which means
that it can be a trustable alternative for enforcing access control policies.
This document presents analyses of blockchain access control systems from the
perspectives of properties, components, architectures, and model supports, as
well as discussions on considerations for implementation.