This book constitutes the refereed proceedings of the 5th International Symposium on Recent Advances in Intrusion Detection, RAID 2002, held in Zurich, Switzerland, in October 2002. The 16 revised full papers presented were carefully reviewed and selected from a total of 81 submissions. The papers are organized in topical sections on stepping stone detection, anomality detection, correlation, legal aspects and intrusion tolerance, assessment of intrusion detection systems, adaptive intrusion detection systems, intrusion detection analysis.