Security is only as sound as one’s ability to validate that the system is trustworthy. No one has ever been able to do it, and no one ever will. Even if you only wanted to make sure your “secure” system remains trustworthy, you need to monitor it. Since history has shown everything can be compromised, your monitoring will likely reveal an intrusion. Therefore, you will need a detection and a response capability. The reader wanted to know my thoughts. I believe that building perfectly secure systems is impossible.”]
Source: https://taosecurity.blogspot.com/2014/12/nothing-is-perfectly-secure.html