CC-Case-Safety and Security Engineering Methodology

CC-Case-Safety and Security Engineering Methodology

Tomoko Kaneko, Nobukazu Yoshioka
Copyright: © 2021 |Pages: 20
DOI: 10.4018/IJSSSP.2021010101
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Abstract

As the complexity of computer systems increases, assuring safety and security is significant. The authors aim to construct a new development methodology CC-Case that can assure the demands of complex systems, including IoT and AI, using safety and security technologies in an integrated manner. As a central framework of CC-Case, this manuscript shows requirements extraction by STAMP/STPA extension to safety and security (STAMP S & S) and assurance using GSN divided into a logical model and a concrete model. STAMP S & S makes it possible to model requirements based on system theory and extract more comprehensive safety and security requirements in a single model diagram. Besides, the GSN defines the overall picture of the assurance and verifies and validates the hazards and threats extracted by STAMP S & S. This paper presents the procedures of CC-Case with STAMP, GSN, and show examples of level 3 autonomous driving.
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Background

Traditional Methods of Safety Analysis

Traditional methods of safety analysis have mostly been developed from 40 to 65 years ago. Since then, the systems have evolved and gone through a complete transformation. The Fault Tree Analysis (FTA) (IEC, n.d.), FMEA (Failure Mode and Effect analysis) (United States Military Procedure, 1949) are traditional hazard analysis method that analyzes hazard factors by using fault trees and impact analysis tables.

It can be applied at the architecture design stage where the system components and failure modes are determined. It is difficult to analyze a single failure of a device or an organization as a hazard factor, although it can be analyzed systematically by logically forming a branch condition that requires an overall field of view, such as an accident generated from the interaction between components.

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