Cyber Security and Machine Learning

Talking about the relationship between cyber security and machine learning, we need to first identify a concept change. In the past, cyber security focuses on blocking the intruders from outside of our network, but today, we have to believe that intruders are among us. They have invaded our systems and they are doing or going to do damages to us. Whatever the compromised device or machine is doing, it's acting abnormally. So, cyber security means anomaly detection.