If you think security is a checklist you or your DevOps team handles right before a Friday release, your system is already vulnerable. When developers first start building applications, they tend to treat security like a moat. They assume that as long as they have a strong login page and a decent firewall, the inner workings of their application are safe. In the industry, we call this a perimeter defense. And in the modern cloud era, it is completely obsolete. The False Security of the Perimeter Defense Here is the fatal flaw with perimeter defense: the moment an attacker finds a single crack in that outer wall, they instantly have the keys to the entire kingdom. They can move laterally, access any database, and compromise the entire system simply because the internal microservices blindly trust one another. Additionally, there is another problem that exists in modern enterprise applications: It is nearly impossible to determine WHERE the perimeter actually lies.…