Formal Techniques for Networked and Distributed Systems FORTE 2004 : 24th IFIP WG 6.1 International Conference Madrid Spain September 27 30 2004. Proceedings This book constitutes the refereed proceedings of the 24th IFIP WG 6.1 International Conference on Formal Techniques for Networked and Distributed Systems FORTE 2004 held in Madrid Spain in September 2004. The 20 revised full papers presented together with 3 invited papers were carefully reviewed and selected from 54 submissions. Among the topics addressed are state based specification distributed Java objects UML and SDL algorithm verification communicating automata design recovery formal protocol testing testing and model checking distributed real time systems formal composition distributed testing automata for ACTL symbolic state space representation pi calculus concurrency Petri nets routing protocol verification and intrusion detection