Password Security Guide

01How to Create a Strong PasswordThe three keys to a strong password are length, randomness and uniqueness. Here are the practical principles for making a safe password and the mistakes to avoid. 02Why You Need a Password ManagerPeople can't memorize dozens of strong passwords. This explains how a password manager works, its benefits, and how to set a secure master password. 03Passphrases: Easy to Remember, Strong to CrackA passphrase that joins several random words is as strong as a random string yet far easier to remember. Here's how it works, how to make a good one, and common misconceptions. 04Protecting Accounts with Two-Factor Authentication (2FA)Even if your password leaks, two-factor authentication can keep your account safe. Learn how 2FA works, how safe each method is, and the recommended setup. 05Password Entropy and How Cracking WorksThis explains why entropy (bits) is the measure of password strength, how brute-force and dictionary attacks work, and how strong a password you actually need. 06What to Do When Your Password Is BreachedHere's what to do quickly when a service you use is hacked and your password leaks, plus preventive measures to limit the damage. 07How to Use Security Questions (Password Recovery) SafelySecurity questions like 'your mother's name' or 'your first pet's name' are often a weaker link than your password. Learn how to set the answers safely. 08Setting a Secure Wi-Fi PasswordYour home or office Wi-Fi password is the gateway that protects the entire network. This covers choosing an encryption method, a strong password, and separating a guest network. 09Phishing: Avoiding Fake Logins That Target Your PasswordEven the strongest password is useless if you type it into a fake site yourself. Here are the signs of phishing and how to avoid falling for it. 10Creating a Secure PIN or Lock CodeEven the short numeric PINs on phones, cards and door locks have rules. Here are the PINs to avoid and safer ones to choose. 11Understanding Fingerprint and Face Authentication (Biometrics)Biometrics are fast and convenient but don't fully replace your password. Learn the benefits, the limits, and how to use them safely. 12How to Share Passwords SafelySending a password over a messenger when sharing an account with family or a team is risky. Here's how to share and manage it safely. 13Passkeys and Passwordless LoginPasskeys, which let you log in without a password, are becoming the new standard. Learn how they work, their benefits, and how to use them.