Why You Should Never Reuse Your Passwords

The quick answer

Use a different, strong password for each important account. When one website suffers a data breach, attackers can try the exposed email-and-password combination on unrelated services. Reusing credentials turns one company's leak into your problem everywhere.

What is credential stuffing?

Attackers collect passwords from breaches and automatically test them against other sites. They don't need to guess your secret if you already used it somewhere compromised. That's why a breach involving an old shopping account can threaten the email address you still rely on.

Start with the accounts that matter most

Protect your primary email account first because password-reset messages for other services often go there. Next prioritize banking, financial services, cloud storage, and accounts with saved payment information. Change any password reused across those services.

How to remember different passwords

Use a reputable password manager to generate and store long, unique passwords. Protect the manager with a strong master password and multifactor authentication when available. Built-in password managers from major browsers and operating systems may be suitable, too; understand the account security and recovery options before relying on one.

What about passkeys?

Passkeys can reduce reliance on traditional passwords on supporting sites. They use cryptographic credentials tied to an account and device or password manager, helping resist many phishing attacks. Keep recovery methods current so losing a phone doesn't mean losing the account.

If you discover reuse today

1. Change the highest-risk account password through the official site or app.
2. Review recent sign-ins and enable multifactor authentication.
3. Change the same reused password everywhere else it appears.
4. Store recovery codes in a safe place outside the account they protect.

Changing one compromised password is helpful. Changing every account that shared it is what closes the door.