Fault Tolerance David Powell LAAS-CNRS, Toulouse

2 Introduction Strengths of EU: –strong industrial base for specific FT systems used in safety-critical applications (transport, energy) –solid academic base for FT concepts and algorithms In the context of an IP — applied research: –cheaper, faster or safer ways to tolerate “traditional” faults –application of fault-tolerance in new contexts, e.g., ubiquitous computing, autonomous systems… –holistic view of fault-tolerance covering the widest possible spectrum of faults

3 Fault Classes

4 Failures due to non-malicious faults transaction processing, electronic switching commercial aircraft, telephone networks [Avizienis, Laprie & Randell 2001] design human interaction physical external physical internal

5 Companies affected per year Source : enquiry carried out on ~400 French companies [CLUSIF, 2001] other = loss of essential services, physical accidents, theft, natural catastrophes

6 Applicable FT research and technology reconfiguration and adaptation device physics & soft-error-tolerant SOCs open source RT kernels digital watermarking FT middleware; reflective systems consensus protocols & group communication dynamic data & process replication and diversity intrusion-tolerant intrusion-detection systems intrusion-tolerant trusted third parties privacy-preserving authorization schemes protocols for QoS assurance physical design human interaction malicious logic intrusions robust HCI

7 Industrial FT needs Case study areas: –e-Business e.g., scalable, highly-available, secure networked clusters –Healthcare e.g., mobile support for medical staff in emergency situations –Aerospace (defence) e.g., dependable architectures and real-time kernels –Critical infrastructure protection e.g., networked energy production Other areas of need: –transportation, space, telecoms…

8 Conclusion Considerable FT expertise in EU covering wide spectrum of faults, both non-malicious and malicious Capitalize by developing generic FT components, esp. intrusion management, middleware and protocols for FT Set of case studies to demonstrate genericity and achievable benefits Need V&V and evaluation tools to demonstrate effectiveness of FT, esp. cost effectiveness