How can we design an architecture for security? The best way to do this is to think like a potential attacker. There are many ways in which you can break a box open but usually, you will look for the cracks where different elements connect. (In the case of a box, this may be between the lid and the bottom of the box.)
In software architecture, connections between elements are called interfaces. Since their main role is to interact with the external world, they are the most vulnerable part of the entire system. Making sure your interfaces are protected, intuitive, and robust will solve the most obvious ways in which your software can be broken.
