Γιατί κάθε ιστότοπος πρέπει να έχει μοναδικό κωδικό

Πώς η επαναχρησιμοποίηση εξαπλώνει τη ζημιά

When one service leaks login data, attackers test the same email and password elsewhere. This automated practice is called credential stuffing. A reused password can expose unrelated accounts.

Τα μοναδικά στοιχεία περιορίζουν την παραβίαση

If each site has a different password, a leak from one service does not directly reveal the credential for another. The email address may still be known, so multi-factor authentication remains valuable.

Τρεις τρόποι για μοναδικότητα

You can use a password manager, passkeys, or a deterministic method with a unique label per service. The method matters less than reliably avoiding reuse and maintaining recovery.

Προστατέψτε πρώτα τους σημαντικούς λογαριασμούς

Email, banking, mobile carrier, cloud storage, and primary social accounts can be used to reset other services. Give these accounts unique credentials, strong second factors, and current recovery codes.

Ένας απλός έλεγχος επαναχρησιμοποίησης

List your most important accounts without writing passwords. Mark where you suspect reuse, then change those credentials one at a time. Start with email and financial services.

Why small variations are not unique

Changing MyPassword1 to MyPassword2 does not create strong account separation. Attackers know users add site names, years, or incrementing numbers. Once one password is exposed, related variants become easier to predict.

A better approach

Use a password manager to generate independent random passwords, or use a carefully designed deterministic generator with account labels. In both cases, one service should not reveal the credential for another.

Prioritizing old accounts

1. Secure primary email accounts.
2. Secure banking and payment services.
3. Secure mobile-provider and cloud-storage accounts.
4. Replace reused credentials on shopping and social accounts.
5. Close accounts you no longer need.

Conclusion

Unique passwords limit breach damage. The goal is not cosmetic variation; it is independent account credentials supported by strong recovery and multi-factor authentication.