RTCA DO-355A

This document is a joint product of two industry committees: the EUROCAE Working Group WG-72, titled "Aeronautical Systems Security" and the RTCA Special Committee SC-216, also titled "Aeronautical Systems Security". WG-72 was formed to address information security and the overall Aeronautical Information System Security (AISS) of airborne systems in conjunction with related ground systems and environment, while SC-216 was formed more specifically to address information security for certification and operation of aircraft and its systems. The guidance provided by this document is intended to constitute an Acceptable Means of Compliance for approving information security aspects of Continuing Airworthiness activities performed by Design Approval Holders and Operators.

This document provides guidance for the operation and maintenance of aircraft and for organizations and personnel involved in these tasks. It is intended to support the responsibilities of the Design Approval Holder (DAH) to obtain a valid airworthiness certificate and aircraft operators to maintain their aircraft to demonstrate that the effects on the safety of the aircraft of information security threats are confined within acceptable levels. As all information security threats may have an intentional origin, this document also covers Intentional Unauthorized Electronic Interaction (IUEI).