Safety and Security Error Propagation

Safety and Reliability follows similar principles for the failure analysis. Especially dependent failure and their analysis did show that the typical sequences of fault, error, failure or failure cause, failure mode and failure effect are not always applicable. Similar challenges are affecting security analysis. Measures to control the different security threads like Integrity, Confidentiality and Availability show different relations to their possible effects and effectiveness. 

Deep Medhi provided a key-note where he presents a common Dependability and security model  

The possible threats (mainly security) had been defined on a level of faults, so that further propagations lead to errors, failure and accidents. Unauthorized access to data and also unavailability had to be considered also as an accident in this case. 

Safety is defined as Attributes as well as also availability, confidentiality, integrity, performance, reliability, survivability, and maintenance. Similar considerations are in railway standards with RAMS -Approach (Reliability, Availability, Maintainability, Safety) and shows also similar ideas like (Fig. 4.28. Basic principle of FMEA) the chapter about error propagation principles. Possible measures, called means, are also similar to possible measures in an FMEA (see also Fig. 4.41)  

This shows that similar analysis approaches for safety and security could be applied, but that there no one2one-relation to be expected. 

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