Cyber security · Interactive model

The Swiss Cheese Model

Every security control is a slice of Swiss cheese: mostly solid, but full of holes — the gaps no single control can close. Threats stream in from the left. A breach happens only when the holes line up all the way through. Toggle layers, resize their holes, and watch the leak-through rate. This is the whole argument for defense in depth, in one picture.

threats through per 1,000
0active layers
your weakest layer