The evolution of airborne networking, and increased network connectivity through satellite broadband to aircraft and the advent of the Internet of Things (IoT) means that avionics systems now need to be developed with both safety and security in mind. In this paper, we discuss the role of avionics security standards RTCA DO326A, DO-355 and DO-356 and their impact on the development of safety-critical avionics systems, and their on-going assurance post deployment.
