Online Security

Lessons

1. 01

   One Password, Many Doors

   See why a reused password, not a clever guess, opens most accounts, and which account to fix first.

   10 steps
2. 02

   The Password Manager

   See how a vault keeps passwords the company can’t read, why it refuses lookalike sites, and how to move in without locking yourself out.

   9 steps·Builds on One Password, Many Doors
3. 03

   The Master Key

   Make the one passphrase that guards your vault from random words, and see why nobody can reset it for you.

   10 steps·Builds on The Password Manager
4. 04

   The Anatomy of 2FA

   See what a second sign-in step proves, why a code is a key you never hand over, and how a stolen phone number redirects your texts.

   9 steps·Builds on One Password, Many Doors
5. 05

   Authenticator Apps

   See how an app makes the same code as the website without either asking the other, why a wrong clock breaks it, and why a typed code can still be stolen.

   9 steps·Builds on The Anatomy of 2FA
6. 06

   What a Passkey Stops

   See how a passkey signs in without sending a secret, why a fake site gets nothing from it, and what it still leaves open.

   11 steps·Builds on Authenticator Apps
7. 07

   Your Way Back In

   Find the recovery loops that would lock you out after losing your phone, and break them with one route that lives somewhere else.

   9 steps·Builds on The Master Key, Authenticator Apps
8. 08

   Sync Is Not a Backup

   See why a synced folder copies your mistakes, what makes a copy a real backup, and how to prove one works by restoring a file.

   11 steps·Builds on Your Way Back In
9. 09

   What Public Wi-Fi Can See

   See what a secure connection hides from the café’s network, what it still shows, what a VPN really changes, and why a warning means stop.

   10 steps
10. 10

    The Padlock Proves the Name

    See why a scam site can have a perfect padlock, and read which part of a web address tells you who really owns the page.

    8 steps·Builds on What Public Wi-Fi Can See
11. 11

    Who Can Read Your Messages

    Find where a message is opened on its way to someone, and the copies and records that sit outside even end-to-end encryption.

    10 steps·Builds on What Public Wi-Fi Can See
12. 12

    The Con at the Front Door

    Recognise the pressure, spoofed numbers and cloned voices that scams use, and beat them with one habit: checking through a route you already know.

    12 steps·Builds on The Padlock Proves the Name
13. 13

    Responding to a Suspected Scam

    Know what to do in the first hour after money or details go: your bank first, then your accounts, then reporting, without assuming any of it is settled.

    13 steps·Builds on The Con at the Front Door
14. 14

    When Your Phone Is Stolen

    Your phone holds your passkeys, codes, texts and bank. Know what to do first, from another device, and what to set up tonight so it never becomes a lockout.

    11 steps·Builds on The Anatomy of 2FA, What a Passkey Stops, Your Way Back In, Sync Is Not a Backup, Responding to a Suspected Scam