CYBERSPACE UNLOCKED - Volume 3: Digital Protection, Encryption and Trust

Defensive Cybersecurity Textbook & Lab Manual | DANNY Publishing

Stop guessing if you're safe. Start knowing.

Your passwords, your accounts, your messages, your files - this is where cybersecurity becomes personal.

Volume 3 is the volume that protects your everyday digital life. It teaches you how to secure what you already have, understand how encryption actually works, and choose privacy tools based on evidence - not hype.

No coding needed. No hacking. 100% defensive, practical, and beginner-friendly.

HOW VOLUME 3 BUILDS ON VOLUMES 1 AND 2

Volume 1 gave you the language of cybersecurity: the CIA triad, risk, threats, vulnerabilities, and defensive thinking.

Volume 2 showed you how the internet actually works: networks, addressing, DNS, DHCP, routing, and how packets move.

Volume 3 puts both together and makes them personal.

You now take the risk mindset from Volume 1 and the network understanding from Volume 2, and apply them to the things you use every day - your accounts, your devices, and your communications.

If Volume 1 was "what is security?" and Volume 2 was "how does it travel?", Volume 3 is "how do I protect myself while I use it?"

You don't need to re-read Volumes 1 and 2 to start here, but everything in Volume 3 builds directly on them - and it prepares you perfectly for the hands-on lab in Volume 4.

WHAT YOU WILL LEARN

UNIT 3 - Your Digital Footprint and Protection Software

The goal is not to hide from the internet. It is to decide what you share, protect the accounts that represent you, limit unnecessary access, spot suspicious behaviour, and recover in an orderly way.

In this unit you will learn to:

- Understand your active, passive, and third-party digital footprint

- Explain how breaches, credential stuffing, and account takeover really work

- Check breach exposure safely and interpret the results

- Apply current NIST password guidance - not old folklore

- Use a password manager correctly: your vault is a high-value asset

- Compare MFA, passkeys, and recovery risks

- Understand antivirus, endpoint protection, EDR, and host firewalls

- Plan updates using exposure, support status, and known exploited vulnerabilities

- Recognise phishing and social-engineering patterns and report them safely

- Review cloud permissions, privacy settings, and a small-business baseline

- Case Study: Redwood Books - a realistic small-business protection scenario

UNIT 4 - VPNs, Encryption and Secure Communication

Unit 3 protects what you store. Unit 4 protects what you send.

The most important habit in this unit: define the problem BEFORE you choose a product. Encryption, VPNs, Tor, and secure messaging solve different problems - and each has a boundary.

In this unit you will learn to:

- Distinguish encryption, encoding, hashing, and digital signatures

- Explain symmetric vs. asymmetric cryptography, and why real protocols combine them

- Understand hybrid encryption and modern protocol design

- Explain TLS, HTTPS, and certificate validation - without treating the padlock as a guarantee of honesty

- Describe what a VPN tunnel actually changes - and what it does NOT change

- Assess "no-logs" and other VPN claims using evidence and threat modelling

- Compare Tor onion routing with a VPN, including exit-relay and endpoint limits

- Distinguish transport TLS from end-to-end email encryption - OpenPGP vs. S/MIME

- Understand secure messaging, metadata, and device boundaries

- Choose secure file-transfer practices and verify the intended recipient

- Case Study: Remote Work From a Hotel - work safely on untrusted Wi-Fi

Plus a Professional Practice Extension: Identity, Cryptography and Trust Engineering - covering key management lifecycle, modern TLS 1.3 (RFC 9846), and authentication + recovery as one system.

WHAT'S INSIDE THE BOOK

- 2 Full Units, 25 Sections: Learning objectives, plain-English key terms, clear explanations, examples, and controlled exercises

- 40 Exam Questions with Answer Explanations: 20 questions per unit to test real understanding, not memorisation

- 5 Printable Worksheets & Guides:

- Account-Security Review

- VPN Provider Assessment

- Threat-Model Worksheet

- Communication Method Selection Guide

- Glossary + Index

- Practitioner Notes, Safety Warnings & Evidence Checks throughout

- Built on Authoritative Sources: NIST SP 800-63B-4, NIST CSF, OWASP, CISA, IETF RFC 9846 (TLS 1.3) & RFC 9580 (OpenPGP), Tor Project, Signal specifications, and U.S. federal law

WHO IS THIS FOR?

- Complete beginners who want to protect themselves and their family

- Students & career changers building a real foundation for cybersecurity

- Remote workers, freelancers & small business owners who handle real customer data

- Professionals who need to explain security clearly to non-technical people

- Anyone who has ever asked: "Am I actually safe, or do I just feel safe?"

WHY THIS BOOK IS DIFFERENT

Most books say: "Use a strong password and a VPN."

This book teaches you to ask a better question:

What is protected, from whom, at which boundary, under which trust assumptions - and what exposure remains?

You will learn to evaluate a tool, not just install it. To verify a claim, not just believe it. To protect your identity, not just your device.

This is defensive cybersecurity. Every exercise is for systems you own or are authorised to administer, using synthetic data and safe practices. It does not teach you to access other people's accounts, intercept communications, or bypass controls.

Your digital life is worth protecting properly.

Get Volume 3 today - and take back control of your accounts, your privacy, and your trust online.