The guidance of this document is intended to augment current guidance for aircraft certification to handle the information security threat to aircraft safety. It adds data requirements and compliance objectives, as organized by generic activities for aircraft development and certification. The document is the first of a series of documents on Aeronautical Systems Security that together will address information security for the overall Aeronautical Information System Security (AISS) of airborne systems with related ground systems and environment. It addresses only Aircraft Type Certification. Because of the impending introduction of aircraft with significant security-related features, this document is proposed for approval in advance of the other documents in this series to address immediate industry concerns and to establish feedback on its implementation challenges.