Client to Authenticator Protocol
E724313
Client to Authenticator Protocol (CTAP) is a FIDO2 standard that defines how external authenticators, such as security keys or biometrics devices, communicate securely with client platforms like browsers and operating systems.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Client to Authenticator Protocol canonical | 2 |
| Client to Authenticator Protocol 2 | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T8288856 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Client to Authenticator Protocol Context triple: [FIDO2, includesComponent, Client to Authenticator Protocol]
-
A.
Secure Authentication Version 5
Secure Authentication Version 5 is a security enhancement for the DNP3 protocol that provides robust authentication and protection against unauthorized control and cyber attacks in industrial control systems.
-
B.
EAP over LAN
EAP over LAN (EAPOL) is a network port-based authentication protocol used in IEEE 802.1X to securely exchange Extensible Authentication Protocol messages over wired or wireless LANs.
-
C.
Initial Connection Protocol
Initial Connection Protocol was an early ARPANET protocol that established and managed initial communication sessions between host computers in the precursor to the modern internet.
-
D.
Authenticator Assurance Level
Authenticator Assurance Level is a NIST-defined measure of the strength and reliability of an authentication process, indicating the degree of confidence that a user has been properly authenticated.
-
E.
Simultaneous Authentication of Equals
Simultaneous Authentication of Equals is a secure password-based key exchange protocol that protects Wi‑Fi connections from offline dictionary attacks and improves authentication robustness.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Client to Authenticator Protocol Target entity description: Client to Authenticator Protocol (CTAP) is a FIDO2 standard that defines how external authenticators, such as security keys or biometrics devices, communicate securely with client platforms like browsers and operating systems.
-
A.
Secure Authentication Version 5
Secure Authentication Version 5 is a security enhancement for the DNP3 protocol that provides robust authentication and protection against unauthorized control and cyber attacks in industrial control systems.
-
B.
EAP over LAN
EAP over LAN (EAPOL) is a network port-based authentication protocol used in IEEE 802.1X to securely exchange Extensible Authentication Protocol messages over wired or wireless LANs.
-
C.
Initial Connection Protocol
Initial Connection Protocol was an early ARPANET protocol that established and managed initial communication sessions between host computers in the precursor to the modern internet.
-
D.
Authenticator Assurance Level
Authenticator Assurance Level is a NIST-defined measure of the strength and reliability of an authentication process, indicating the degree of confidence that a user has been properly authenticated.
-
E.
Simultaneous Authentication of Equals
Simultaneous Authentication of Equals is a secure password-based key exchange protocol that protects Wi‑Fi connections from offline dictionary attacks and improves authentication robustness.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
FIDO2 standard
ⓘ
authentication protocol ⓘ |
| abbreviation | CTAP ⓘ |
| alsoKnownAs |
FIDO2 CTAP
ⓘ
linked to:
FIDO2
|
| appliesTo |
desktop platforms
ⓘ
embedded devices ⓘ mobile platforms ⓘ |
| backwardsCompatibleWith | FIDO U2F ⓘ |
| category |
computer security standard
ⓘ
internet standard ⓘ |
| communicatesWith |
client platforms
ⓘ
operating systems ⓘ web browsers ⓘ |
| defines | communication between client platforms and external authenticators ⓘ |
| developedBy | FIDO Alliance ⓘ |
| enables | FIDO2 authentication flows ⓘ |
| ensures | secure communication between client and authenticator ⓘ |
| extends | U2F protocol ⓘ |
| goal |
improve web authentication security
ⓘ
mitigate phishing attacks ⓘ reduce reliance on passwords ⓘ |
| partOf | FIDO2 ⓘ |
| relatedTo |
WebAuthn
ⓘ
linked to:
Web Authentication API
|
| specifies |
authenticator capabilities
ⓘ
authenticator commands ⓘ error codes ⓘ message formats ⓘ |
| standardizedBy | FIDO Alliance ⓘ |
| standardizedWith |
W3C WebAuthn
ⓘ
linked to:
FIDO2
|
| supports |
biometric authenticators
ⓘ
platform authenticators ⓘ roaming authenticators ⓘ security keys ⓘ |
| supportsFeature |
PIN-based protection
ⓘ
enterprise attestation ⓘ resident keys ⓘ user verification ⓘ |
| supportsTransport |
BLE
ⓘ
linked to:
Bluetooth
NFC ⓘ USB ⓘ |
| usedFor |
multi-factor authentication
ⓘ
passwordless authentication ⓘ second-factor authentication ⓘ strong user authentication ⓘ |
| uses | public key cryptography ⓘ |
| version |
CTAP1
ⓘ
CTAP2 ⓘ
linked to:
CTAP
|
| worksWith | Web Authentication API ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Client to Authenticator Protocol Description of subject: Client to Authenticator Protocol (CTAP) is a FIDO2 standard that defines how external authenticators, such as security keys or biometrics devices, communicate securely with client platforms like browsers and operating systems.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Client to Authenticator Protocol