Due to increasing functionality associated with rising complexity of aircraft cabin systems which are used by cabin crew, passengers, maintenance staff and other stakeholders, security engineering has to become an integral part of the system engineering process in aviation industry. This paper deals with a security engineering process approach for the development of complex aircraft systems, which is fully integrated into the development process. As an appropriate process model we introduce the so called three-V-model, which represents the governing system engineering process (SEP) associated with the safety engineering process (SafEP) and the security engineering process (SecEP). All three processes are pursued concurrently and are interacting reciprocally on each development level with the predominant SEP. We describe in detail involved security engineering activities and finally demonstrate how the interaction between the SEP and the SecEP is improved and optimized by the use of so called security context parameters (SCPs).