Software increasingly controls critical civil aviation functions and secure distribution and loading of the aircraft, ground and space segment software is crucial to ensure safety of aviation. The cyber-security aspects of the aircraft software distribution and dataloading has been analyzed in this report including legacy aircraft and future concepts. This report provides recommendations on securing legacy, current and future aircraft with considerations for implementing increased security in an economically viable manner. The report thus provides short term recommendations for immediate improvements in software security as well as medium- and long-term recommendations to ensure a sustainable, secure aviation ecosystem and to be prepared for future technologies and uses cases. These recommendations are directed mainly at the generation of standards and will allow AIA to ensure standards are developed and applied appropriately.