Testing and evaluating computer intrusion detection systems
R.C. Durst, Terrence G. Champion, Brian Witten, Eric Thomas Miller, Luigi Spagnuolo · Communications of the ACM · 1999
Accounting Office (GAO) disclosed that approximately 250,000 break-ins into Federal computer systems were attempted over the previous year.At least 10 major agencies, comprising 98% of the total Federal budget, had been attacked.The GAO went on to say that an estimated 64% of these attacks (about 160,000) were successful.It gets worse: the number of attacks is doubling every year.Based on previous studies, the GAO estimates that only 1% and 4% of these attacks will be detected and only about 1% will be reported.