How is protocol anomaly detection helpful in intrusion detection systems?
Intrusion is harmful for personal PCs, organizations, government agencies sensitive installations such as nuclear, space and military programs. Some of the high profile intrusive events are given below. In 1997 Department of Defense systems were hacked for a year and unclassified sensitive information was extracted. In 1999 NASA systems were hacked for file listing and people directories. Parking tools were installed as reference points. Attacks were reported on US official sites during American bombing of Chinese Embassy in Belgrade in 1999. According to data gathered in 1999 there were daily 80 to 100 attacks on US military systems. The sophistication of attacks had increased, such as limiting number of ping etc. In early days intrusions were carried out by experts to gauge there skills. They developed their own tools and wrote their own scripts. Later on hacking was carried out due to other factors such as financial, political and military. Mostly e-commerce web sites are targeted f
