Multi-factor authentication is
|“||[a]uthentication using two or more factors to achieve authentication. Factors include: (i) something you know (e.g. password/PIN); (ii) something you have (e.g., cryptographic identification device, token); or (iii) something you are (e.g., biometric). ||”|
|“||authentication through verification of at least two of the following types of authentication factors:||”|
- ↑ NIST Special Publication 800-53.
- ↑ Cybersecurity Requirements for Financial Services Companies, at 2.