Does an SMS code really protect you, or does it just give a hacker an easier back door?
Using text messages (SMS) or email as an authentication factor is the least secure method today. Hackers use methods like SIM Swapping to get your codes sent directly to their device. In that case, you've just increased the number of devices an attacker can use to authenticate as you.
| Authentication Method | Protection Level | Main Risk |
|---|---|---|
| SMS / Email | ❌ Very Low | Remote code interception, SIM takeover. |
| Authenticator App (random code) | ⚠️ Medium | Phishing (the user reads the code out to the attacker). |
| Forensic Human Approval (MFA Push) | ✅ Highest | Requires physical, conscious approval from the user. |
The safest method is using a dedicated authenticator app (like Microsoft Authenticator). Authentication includes a random code generated locally on the device or a human approval that requires you to physically confirm access. This prevents a situation where a hacker can "replicate" your authentication.