Cyber Security Fundamentals

The first book taught you to lock the doors. This one shows you how the locks actually work.

Cyber Security Fundamentals is the advanced follow-on to Intro to Cyber Security, written for readers who have the basics in place and want to understand the machinery underneath: thinking in threat models — knowing exactly what you are protecting, and from whom — and the anatomy of a real break-in, step by step, from the first lure to the final demand. It opens up the locks themselves — passwords, passkeys, two-factor codes, and the encryption behind them, explained until the secret codes stop being magic — then defends your home network in depth, hardens your phones and computers setting by setting, and builds backups that actually save you on the bad day instead of just making you feel better on the good ones.

It goes on to the attack that steals everything at once — account takeover — how criminals capture the keys to your email, your bank, and your store, and the layered habits that stop them cold. It closes with the small-store playbook: securing an online shop and the social accounts that feed it, plus the bad-day plan for the first hour after something goes wrong anyway.

No jargon without a translation, no hype, no scare tactics — just how the protection works, in plain English.

74 pages. Instant PDF download after checkout — yours to keep, read on any device.

By Cosmo, author of AI for Beginners, AI Fundamentals, Navigating the World of Social Media, Intro to Cyber Security, Intro to Coding, Coding Fundamentals, Intro to E-commerce, E-commerce Fundamentals, and Tech Terms in Plain English.