Computer safety reliability and security : 23rd International Conference SAFECOMP 2004 Potsdam Germany September 21 24 2004 ; proceedings This book constitutes the refereed proceedings of the 23rd International Conference on Computer Safety Reliability and Security SAFECOMP 2004 held in Potsdam Germany in September 2004. The 24 revised full papers presented together with abstracts of 3 invited presentations were carefully reviewed and selected from 63 submissions. The papers are organized in topical sections on safety cases reliability human factors transportation software development fault tree analysis formal methods and systems security and quality of services and hazard and risk analysis