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Privacy#mfa#2fa#authentication

Is an authenticator app really safer than SMS codes?

By Cyberstar Editorial·June 4, 2026 4 min 0
Short answer

Yes. SMS can be intercepted via SIM-swap or SS7 attacks; authenticator apps generate codes locally on your device and never leave it.

The full answer

SMS-based two-factor codes travel through the cell network, which attackers can hijack by social-engineering your carrier into porting your number to their SIM. Once they own the number, every code lands in their hands.

Authenticator apps (Google Authenticator, Authy, 1Password, Aegis) generate TOTP codes from a shared secret stored only on your device. There is no network leg to intercept.

For the highest tier, use a hardware key (YubiKey, Titan) with FIDO2/WebAuthn. These are phishing-resistant because the browser checks the site's real origin before signing.

Practical rule: enable app-based MFA everywhere; reserve SMS only for sites that refuse anything else, and never use SMS for email or your password manager.

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