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Questions and Answers
What does the Principle of Least Privilege emphasize?
Which statement best describes the concept of Defense in Depth?
What is implied by the phrase 'Constant vigilance' in security?
Which philosophy aligns with the understanding that there is no such thing as absolute security?
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What does the KISS Principle stand for in the context of security?
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What is one of the key goals of the Separation of Duties principle?
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What role does secure design play in security practices?
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Why is it a concern to rely on Security by Obscurity?
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Study Notes
Last Week's Assignment
- Read Schneier's essay, "Policy vs. Technology," and be prepared to discuss insights.
Secure Thinking
- Security architects consider how systems fail, unlike "normal" architects who focus on how systems work.
- Absolute security is impossible; the question is "secure enough?".
- Constant vigilance is crucial; security is a moving target. Presumed security is dangerous.
- Zero Trust philosophy is a natural outcome of this approach.
IT Security and CIA Triad
- IT security focuses on Confidentiality, Integrity, and Availability (CIA).
Security Principles
- Principle of Least Privilege: Grant authorized users only necessary access; avoid "privilege creep." "Less is more." Includes hardening (removing unnecessary services, changing defaults).
- Defense in Depth: Multiple security mechanisms create a failsafe; no single mechanism is sufficient.
- Separation of Duties (Segregation of Duties): Prevents single-person control; requires collusion to compromise the system; provides built-in oversight.
- Secure by Design: Integrate security from the initial design phase; don't treat it as an afterthought.
- KISS Principle (Keep It Simple Stupid): Complexity undermines security.
Security by Obscurity?
- The notes do not explicitly discuss this topic beyond mentioning it at the end.
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Description
Explore key concepts in IT security, including the CIA triad, the Principle of Least Privilege, and Defense in Depth. This quiz encourages you to think critically about the balance between security and usability, as well as the implications of the Zero Trust philosophy. Prepare to discuss these insights and apply them to real-world scenarios.
