The goal of intrusion detection systems(IDS) is to protect from the signs of security problems. However, since an IDS usually
depends on the monitored data and has to identify an intruder, the running of IDS comes to threaten users’ privacy. In this
paper, we propose a new privacy preserving method in intrusion detection system by applying cryptographic methods to log files.
It can meet the enhanced privacy of users as well as the security of network providers without TTP.
Keywords Privacy - Intrusion Detection System - Host-based IDS - Privacy Homomorphism - Audit log
This research was supported by the MIC(Ministry of Information and Communication), Korea, under the ITRC(Information Technology
Research Center) support program supervised by the IITA(Institute of Information Technology Assessment).