Age-old security is broken because it uses antique techniques
Throughout the past ten years, security methods have remained relatively unchanged. These methods rely solely on signatures, heuristics and dataflow analysis and are focused on defending the networks. The problem is that hackers have learned how to work around predefined network controls.
The majority of today's firewalls still have to run thousands of patterns to match for known attacks, and false positives and false negatives run high -- making it difficult to determine what is normal. These traditional methods rely on code that is constantly changing. The thing you’re trying to detect is changing because the application itself is always changing, causing solutions to be out of date as soon as they are created.