FIDO Technology & Digital Tools 2

Question 1

Which transport protocol does a FIDO2 authenticator use when communicating over NFC?

Accepted Answer

CTAP2 over ISO 14443

Answer

CTAP2 messages are carried over ISO 14443 (NFC) when an authenticator communicates with a platform via NFC.

Question 2

In the FIDO2 ecosystem, what is the role of the 'platform authenticator'?

Accepted Answer

An authenticator built into the user's device OS or hardware

Answer

A platform authenticator is integrated into the device itself (e.g., Windows Hello, Touch ID) rather than being a separate hardware token.

Question 3

What does the 'UV' flag in an authenticator assertion data structure indicate?

Accepted Answer

User Verification was performed by the authenticator

Answer

The UV (User Verification) flag in authenticator data signals that the authenticator performed local user verification such as biometrics or PIN.

Question 4

Which algorithm identifier is used in FIDO2 for the EdDSA signature scheme over Curve25519?

Accepted Answer

-8

Answer

COSE algorithm identifier -8 (EdDSA) is used for the Ed25519 signature scheme in FIDO2 credentials.

Question 5

What is the purpose of the 'fmt' field in a FIDO2 attestation object?

Accepted Answer

Identifies the attestation statement format being used

Answer

The 'fmt' field names the attestation format (e.g., 'packed', 'tpm', 'fido-u2f') so the relying party knows how to parse and verify the attestation statement.

(FIDO) FIDO Certified Authenticator Practice Test

(FIDO) FIDO Certified Authenticator Practice Test

FIDO Technology & Digital Tools 2