Multi-factor authentication and phishing resistance
All AmbiSecure engineering content tagged MFA, newest first. Newer entries reflect current thinking; earlier entries come from the engineering archive.
Multi-factor authentication (MFA) combines two or more independent factors — something you know, have, or are — so a stolen password alone cannot grant access. But not all MFA is equal: SMS and app one-time passwords remain phishable, while phishing-resistant hardware factors (FIDO2 security keys, smart cards) resist adversary-in-the-middle attacks entirely.
This category collects engineering and decision-maker writing on MFA: why it matters, the benefits and limits of each factor, and how hardware-backed, phishing-resistant MFA raises assurance for enterprise and government. The recurring argument is that the choice of factor — not merely the presence of a second step — determines the real security gain.
Articles tagged MFA
Passkeys vs Traditional MFA
Top 3 Benefits of MFA
Why Use Multi-Factor Authentication
Common Misconceptions about Two-Factor Authentication
Single Sign-On Vs. Multi-Factor Authentication
Multi-factor Authentication in Government Sector
SMS-based OTP Authentication and Its Disadvantages
Frequently asked questions
Is all multi-factor authentication equally secure?
No. SMS and app OTPs are phishable and interceptable; phishing-resistant factors such as FIDO2 security keys and smart cards bind the credential to the origin and hardware, resisting real-time proxy phishing that defeats OTP-based MFA.
What are the main benefits of MFA?
MFA blocks the large class of attacks that rely on a stolen or guessed password alone, dramatically reducing account-takeover risk — especially when the second factor is a hardware, phishing-resistant credential.
What is phishing-resistant MFA?
MFA where the second factor cannot be relayed to a fake site — typically FIDO2/WebAuthn or PIV smart cards — because the credential is bound to the legitimate origin and signed by a non-exportable hardware key.
Why is SMS treated as a weak second factor?
Because it depends on the telephone network rather than on the user. SIM-swap fraud and SS7 interception both deliver the code to an attacker without touching the user's device.
Does MFA slow users down?
It depends entirely on the factor. A hardware key is a touch or a tap and is usually faster than typing a code from a phone, which is why friction arguments track the implementation rather than MFA itself.