Remember U2F
Full name: Universal 2nd Factor
Memory aid: A Universal second Factor supports stronger sign-in.
U2F and modern WebAuthn/CTAP deployments have different capability models.
Study area: Identity & access · Batch 8
Relevant study for: CompTIA Security+ SY0-701 · ISC2 CISSP 2024 outline · ISC2 SSCP · Security, Compliance, and Identity Fundamentals SC-900 · Identity and Access Administrator SC-300 · ISC2 CC · Cybersecurity Architect SC-100
Practice with exam flashcards →Cybersecurity & Identity / Knowledge library
U2F — Universal 2nd Factor
Defines an earlier FIDO public-key second-factor authentication approach.
Why learn U2F — Universal 2nd Factor?
Defines an earlier FIDO public-key second-factor authentication approach.
Where it came from
U2F and modern WebAuthn/CTAP deployments have different capability models.
- Memory aid (a learning cue, not the expansion): A Universal second Factor supports stronger sign-in.
Build your understanding
Work through these exercises in order. Try the task before opening a reference.
- Without looking, expand U2F: Universal 2nd Factor.
- Recall this memory aid: A Universal second Factor supports stronger sign-in.
- Explain the practical use: Defines an earlier FIDO public-key second-factor authentication approach.
- Explain this distinction: U2F and modern WebAuthn/CTAP deployments have different capability models.
- Identify U2F in a device specification, architecture diagram, or system inventory.
Documentation and sources
- FIDO Alliance specifications (fidoalliance.org)