CCT 368: CISSP Asset Security and Data Classification (Domain 2)

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Nine million images. No password. No encryption. And the defence was basically: “It wasn’t public because you had to know the URL.” That single line opens up one of the most important CISSP Domain 2 conversations you can have: security through obscurity is not access control, and a hidden address is not a key. We take this real data exposure and translate it into the kind of manager-level reasoning the CISSP exam demands, not memorised trivia.

We then zoom out into Asset Security fundamentals: identification and inventory, data classification based on impact, and the roles that make controls enforceable. We break down data owner versus custodian, plus controller and processor language you will see in privacy frameworks like GDPR. The core takeaway is simple and painful: without a named owner, nothing downstream is mandatory, so encryption, authentication, retention jobs, and evidence-producing logging keep losing to deadlines.

Finally, we turn the incident into practice questions and “spot the trap” exam thinking: accountability does not transfer when you outsource, absent controls are not weak controls, and impact is not likelihood. We also hit retention and destruction across the data lifecycle, including NIST SP 800-88 clearing, purging, and destruction, and where degaussing and crypto erase really belong.

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