  Blockchain is a popular method to ensure security for trusted systems. The
benefits include an auditable method to provide decentralized security without
a trusted third party, but the drawback is the large computational resources
needed to process and store the ever-expanding chain of security blocks. The
promise of blockchain for edge devices (e.g., internet of things) poses a
variety of challenges and strategies before adoption. In this paper, we explore
blockchain methods and examples, with experimental data to determine the merits
of the capabilities. As for an aerospace example, we address a notional example
for Automatic dependent surveillance-broadcast (ADS-B) from Flight24 data
(https://www.flightradar24.com/) to determine whether blockchain is feasible
for avionics systems. The methods are incorporated into the Lightweight
Internet of Things (IoT) based Smart Public Safety (LISPS) framework. By
decoupling a complex system into independent sub-tasks, the LISPS system
possesses high flexibility in the design process and online maintenance. The
Blockchain-enabled decentralized avionics services provide a secured data
sharing and access control mechanism. The experimental results demonstrate the
feasibility of the approach.
