The previous example of the castle from Chap. 1 already clearly illustrates how important and indispensable every single aspect and employee is in this overall structure, especially when it comes to internal security. Every castle, indeed even every kingdom, is only as secure as its guards can watch over and defend it. The walls are high, the moat wide and deep, the guards all in their positions. The scouts are also doing a great job. And yet, there is always the risk that the threat does not necessarily have to come from outside, from enemy territory. What if the danger lurks within the castle walls?