2FA means two-factor authentication. MFA means multifactor authentication and can use two or more factors.
In brief….In the current language, both terms are often used interchangeably. The most important is to choose phishing-resistant factors and to provide secure recovery methods.
Solution A….
MFA
MFA requires several evidences that ideally belong to different categories: knowledge, possession or biometrics.
Key points…
- General term for two or more factors
- Can combine password, physical key and biometrics
- Resistance depends on the method chosen
Solution B….
2FA
2FA is a special case of MFA with exactly two factors.
Key points…
- Password plus application or key
- Safer than a password alone
- SMS remains more vulnerable than security keys or some password-free methods
Comparative table….
| Criterion…. | MFA | 2FA |
|---|---|---|
| Number | At least two factors | Exactly two factors |
| Relationship | General Category | Sub-total of MFA |
| Example | Password + key + biometrics | Password + application |
| Security | Depends on factors | Depends on both factors |
Choose MFA if…
You define a general policy or wish to allow several combinations of factors.
Choose 2FA if…
You describe precisely a route using two factors.
Key takeaways
In the current language, both terms are often used interchangeably. The most important is to choose phishing-resistant factors and to provide secure recovery methods.
Deepening the two notions….
← Back to all comparison…
See also:…. MFA Fatigue.