The growing adoption of Radio-frequency Identification (RFID) systems, particularly in
the healthcare field, demonstrates that RFID is a positive asset for healthcare institutions. RFID
offers the ability to save organizations time and costs by enabling data of traceability, identification,
communication, temperature and location in real time for both people and resources. However,
the RFID systems challenges are financial, technical, organizational and above all privacy and
security. For this reason, recent works focus on attribute-based access control (ABAC) schemes.
Currently, ABAC are based on mostly centralized models, which in environments such as the supply
chain can present problems of scalability, synchronization and trust between the parties. In this
manuscript, we implement an ABAC model in RFID systems based on a decentralized model such as
blockchain. Common criteria for the selection of the appropriate blockchain are detailed. Our access
control policies are executed through the decentralized application (DApp), which interfaces with the
blockchain through the smart contract. Smart contracts and blockchain technology, on the one hand,
solve current centralized systems issues as well as being flexible infrastructures that represent the
relationship of trust and support essential in the ABAC model in order to provide the security of RFID
systems. Our system has been designed for a supply chain environment with an use case suitable for
healthcare systems, so that assets such as surgical instruments containing an associated RFID tag can
only access to specific areas. Our system is deployed in both a local and Testnet environment in order
to stablish a deep comparison and determining the technical feasibility