A New Method for Writing Assurance Cases

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Author(s): Yutaka Matsuno (Nagoya University, Japan)and Shuichiro Yamamoto (Nagoya University, Japan)
Copyright: 2015
Pages: 19
Source title: Transportation Systems and Engineering: Concepts, Methodologies, Tools, and Applications
Source Author(s)/Editor(s): Information Resources Management Association (USA)
DOI: 10.4018/978-1-4666-8473-7.ch077

Keywords: Civil Engineering / Engineering Science Reference / Science & Engineering

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Abstract

In this paper, the authors present a new method for writing assurance cases. Assurance cases are documented bodies of evidence that provide a convincing and valid argument that a system is adequately dependable for a given application in a given environment. Assurance cases have been used mostly in the safety field, but are now beginning to be widely applied in other areas. Cyber security is one such area, and recently, assuring security of cyber systems has become crucial. Several methods and various guidelines for writing assurance cases have been used. Unfortunately, only experts are currently able to write assurance cases, and it is still difficult for ordinary engineers to write them. This paper presents a new method for writing assurance cases. The main ideas are that (1) documents generated and used during the system lifecycle must be either used by the assurance cases or must be referred to in the assurance cases, and (2) typical patterns exist for assurance cases, and these patterns have not yet been well discussed. This paper presents the preliminary steps in developing a method for writing assurance cases. The authors also report on a preliminary experiment carried out on a web server demo system.

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