Security- and Safety-Driven Functional Architecture Development Exemplified by Automotive Systems Engineering

Abstract

Advancing digitization is creating fascinating potential benefits, especially in the automotive domain, through technologies such as Car2x and autonomous driving. However, new information and communication technologies result in a continuous increase in product complexity and in challenges for the development of current and future mobility systems. Systems Engineering represents a well-established approach for meeting these challenges. In particular, an early function-oriented engineering ensures a holistic, systemic development across all involved disciplines. A functional architecture is modeled as an essential artifact for this purpose, which represents the system to be developed independently of concrete technical solutions and allows early design decisions. An essential requirement in the development of current and future mobility systems is ensuring system dependability by addressing security and safety holistically at an early stage. Since this is mostly done very late in subsequent development phases, the goal of this work is to show the synergy potential by addressing security and safety in functional architecture development exemplified by Automotive Systems Engineering. For this purpose, based on the challenges of system development of complex mobility systems, established approaches of the state of the art are consistently integrated within the scope of a continuous systematics. A use case-oriented function modeling based on the state of art (e.g., FAS method) is used as a basis. The developed approach allows a systematic capture of architecture drivers as well as the modeling of the functional architecture by a holistic identification and structuring of functions. It enables security- and safety-relevant aspects (e.g., from threat and hazard scenarios) to be integrated especially in early phases on the basis of a functional architecture and to be taken into account in the context of design decisions.