TAILIEUCHUNG - Lecture Software engineering (9/e): Chapter 12 - Sommerville

Chapter 12 – Dependability and security specification. The objective of this chapter is to explain how to specify functional and non-functional dependability and security requirements. When you have read this chapter, you will: understand how a risk-driven approach can be used for identifying and analyzing safety, reliability, and security requirements; understand how fault trees can be used to help analyze risks and derive safety requirements;. | Chapter 12 – Dependability and Security Specification Lecture 1 1 Chapter 12 Dependability and Security Specification Topics covered Risk-driven specification Safety specification Security specification Software reliability specification 2 Chapter 12 Dependability and Security Specification Dependability requirements Functional requirements to define error checking and recovery facilities and protection against system failures. Non-functional requirements defining the required reliability and availability of the system. Excluding requirements that define states and conditions that must not arise. 3 Chapter 12 Dependability and Security Specification Risk-driven specification Critical systems specification should be risk-driven. This approach has been widely used in safety and security-critical systems. The aim of the specification process should be to understand the risks (safety, security, etc.) faced by the system and to define requirements that reduce these risks. 4 Chapter 12 .

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