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CISA® Certified Information Systems Auditor®: Study Guide, Third Edition by David Cannon

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Understanding the Threat

Protecting information assets is a significant challenge. The very subject of security conjures up a myriad of responses. This chapter provides you with a solid overview of practical information about security. The unfortunate reality is that concepts of security have not evolved significantly over the last 2,000 years. Let me explain.

The medieval design of security is still pervasive. Most of your customers will view security as primarily a perimeter defense. History is riddled with failed monuments attesting to the folly of overreliance on perimeter defenses. Consider the castle walls to be equivalent to the office walls of the client’s organization. Fresh water from the creek would be analogous to our modern-day utilities. ...

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