On behalf of the program committee, it is our pleasure to present to you the proceedings of the fourth Recent Advances in Intrusion Detection Symposium. The RAID 2001program committee received 55 paper submissions from 13 countries. All submissions were carefully reviewed by several members of the program committee on the criteria of scienti?c novelty, importance to the ?eld, and technical quality. Final selection took place at a meeting held on May 16-17 in Oakland, California. Twelve papers were selected for presentation and pub- cation in the conference proceedings. In addition, nine...

On behalf of the program committee, it is our pleasure to present to you the proceedings of the Fifth Symposium on Recent Advances in Intrusion Detection (RAID). Since its ?rst edition in 1998, RAID has established itself as the main annual intrusion detection event, attracting researchers, practitioners, and v- dors from all over the world. The RAID 2002 program committee received 81 submissions (64 full papers and 17 extended abstracts) from 20 countries. This is about 50% more than last year. All submissions were carefully reviewed by at least three program comm- tee members or additional...