Critical Information Infrastructures Security 4th International Workshop, CRITIS 2009, Bonn, Germany, September 30 - October 2, 2009, Revised Papers

On Modelling of Inter-dependent Network Infrastructures by Extended Leontief Models.- Critical Infrastructure Protection in Brazil - Threat Identification and Analysis.- Development of Information Security-Focused Incident Prevention Measures for Critical Information Infrastructure in Japan.- Design of a Mobile Agent-Based Adaptive Communication Middleware for Federations of Critical Infrastructure Simulations.- An Alternate Topology Generator for Joint Study of Power Grids and Communication Networks.- Trouble Brewing: Using Observations of Invariant Behavior to Detect Malicious Agency in Distributed Control Systems.- Optimisation of Critical Infrastructure Protection: The SiVe Project on Airport Security.- Cyber-Critical Infrastructure Protection Using Real-Time Payload-Based Anomaly Detection.- Decision Aid Tool and Ontology-Based Reasoning for Critical Infrastructure Vulnerabilities and Threats Analysis.- Application Filters for TCP/IP Industrial Automation Protocols.- Web Browser Security Update Effectiveness.- State-Based Network Intrusion Detection Systems for SCADA Protocols: A Proof of Concept.- Towards Early Warning Systems – Challenges, Technologies and Architecture.- CII Protection - Lessons for Developing Countries: South Africa as a Case Study.- Energy Theft in the Advanced Metering Infrastructure.- Current Capabilities, Requirements and a Proposed Strategy for Interdependency Analysis in the UK.- Stochastic Modelling of the Effects of Interdependencies between Critical Infrastructure.