Making Sense of Cybersecurity by Thomas Kranz;

Author:Thomas Kranz; [Kranz, Thomas]
Language: eng
Format: epub
Publisher: Simon & Schuster
Published: 2022-10-19T22:00:00+00:00

Moats around the castle (usually filled with water or nasty wooden spikes)

Multiple fortified internal structures (e.g., stables, grain storage, barracks)

Inner walls around some of the more important fortified structures

A further inner wall around the keep

Raising the keep and protecting its foundations

A second, smaller fortified gate, called a sally port, so that defenders could exit the castle safely and launch a counterattack

Figure 6.13 An evolution of the basic perimeter security castle design. The extra defenses make the design more complex but add much more security.

One of the secrets of the success of fortified centers like Warwick Castle is that they have evolved over time to take into account the evolving threats they face, created a constant feedback loop that analyzes the threats they face, and adapted their security measures to match them. Adding layers of security and new security technologies means we don’t rely on one type of defense; we’re not relying on something like one gate, which is a single point of failure. Defense in depth is a concept fully embraced by Warwick Castle: when an attacker breaches one layer of defense, they have to start their attack all over again to breach the next level. We can apply the same idea to our example corporate infrastructure. As it stands, there is a single point of failure: a single, central firewall (figure 6.14).

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