Learning in the open

Cybersecurity, explained plainly

I’m relearning cybersecurity while I study for the CEH, and writing a lesson for each topic as I go. Every lesson is short, uses an animated illustration to show what is actually happening, and assumes you are starting from zero.

No prior background needed. If a term turns up, it gets defined. Pick a module below and read in order, or jump to whatever you came for.

Foundations

The vocabulary and ideas everything else rests on: what we protect, who attacks it, and why.

Confidentiality, integrity, availability
Almost every security measure ever invented is protecting one of three things: who can read your data, whether it is still correct, and whether you can get to it when you need it.
15 October 2026

Cybersecurity, explained plainly

Foundations

Confidentiality, integrity, availability