Cybersecurity

Cybersecurity: What Do I Already Know About This?~How Digital Attacks Work and Why Security Begins with Trust~Series 'In Twelve Evenings'BOOK 15Vita HarwoodTest your knowledge!Can a computer be compromised while everything still appears to work? Why does a password not always prove that you are really you? How can one convincing message bypass expensive defenses, what actually happens during a ransomware attack, and why is an IP address not a passport?Cybersecurity, part of the In Twelve Evenings series, explains digital security as a connected system rather than a collection of frightening hacker stories. Across twelve lessons, readers follow data through a network, unpack passwords and authentication, see what cryptography is for, distinguish viruses from worms and Trojans, and understand how social engineering, software vulnerabilities, segmentation, zero trust, logging, and incident response fit together.The final evenings widen the view beyond a single device. Cybercrime, state-sponsored groups, attribution, artificial intelligence, and post-quantum cryptography show why the field keeps changing and why strong defense begins with risk, architecture, and trust rather than a single security product.Designed for readers aged 15 and up and for adults starting from scratch, the course explains mechanisms without turning into a hacking manual. Every lesson includes a researcher portrait, a surprising fact, key terms, a ten-question test, and a safe practical exercise. The book closes with explanations for all 120 test questions, a full glossary, sources, and recommendations for further reading.If you have ever wondered what is really happening between a click, a login, an alert, and a breach, this book gives you a map of the digital world and the language to reason about it.