NTP Autokey
E234531
NTP Autokey is a cryptographic authentication and key management protocol designed to secure time synchronization in the Network Time Protocol (NTP).
All labels observed (3)
| Label | Occurrences |
|---|---|
| NTP Autokey canonical | 1 |
| NTPv4 Autokey Specification | 1 |
| Network Time Protocol Version 4: Autokey Specification | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2108361 — 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: NTP Autokey Context triple: [Network Time Protocol, securityExtension, NTP Autokey]
-
A.
Network Time Protocol
Network Time Protocol (NTP) is a widely used networking protocol designed to synchronize the clocks of computers and devices over packet-switched, variable-latency data networks.
-
B.
Kerberos
Kerberos is a small, irregularly shaped moon of Pluto discovered in 2011 as part of the Pluto system’s complex family of satellites.
-
C.
Kerberos
Kerberos is a network authentication protocol that uses secret-key cryptography to securely verify the identity of users and services in distributed systems.
-
D.
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.
-
E.
Temporal Key Integrity Protocol
Temporal Key Integrity Protocol (TKIP) is a legacy wireless security algorithm designed to enhance WEP encryption in early Wi‑Fi networks by dynamically changing encryption keys.
- 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: NTP Autokey Target entity description: NTP Autokey is a cryptographic authentication and key management protocol designed to secure time synchronization in the Network Time Protocol (NTP).
-
A.
Network Time Protocol
Network Time Protocol (NTP) is a widely used networking protocol designed to synchronize the clocks of computers and devices over packet-switched, variable-latency data networks.
-
B.
Kerberos
Kerberos is a small, irregularly shaped moon of Pluto discovered in 2011 as part of the Pluto system’s complex family of satellites.
-
C.
Kerberos
Kerberos is a network authentication protocol that uses secret-key cryptography to securely verify the identity of users and services in distributed systems.
-
D.
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.
-
E.
Temporal Key Integrity Protocol
Temporal Key Integrity Protocol (TKIP) is a legacy wireless security algorithm designed to enhance WEP encryption in early Wi‑Fi networks by dynamically changing encryption keys.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
Network Time Protocol extension
ⓘ
cryptographic authentication protocol ⓘ key management protocol ⓘ |
| appliesTo | Network Time Protocol ⓘ |
| associatedWith | University of Delaware ⓘ |
| basedOn |
X.509 public key certificates
ⓘ
linked to:
X.509 certificates
|
| designedBy | David L. Mills ⓘ |
| designedFor |
hierarchical NTP server-client topologies
ⓘ
unicast NTP associations ⓘ |
| documentedIn | RFC 5906 ⓘ |
| ensures |
that NTP clients can verify server identity
ⓘ
that time packets are not modified in transit ⓘ |
| goal |
prevent spoofed NTP servers
ⓘ
prevent tampering with time synchronization ⓘ |
| hasComponent |
Autokey protocol state machine
ⓘ
certificate exchange mechanism ⓘ identity scheme ⓘ key distribution mechanism ⓘ key generation mechanism ⓘ |
| hasLimitation |
complex to configure correctly
ⓘ
vulnerable to certain cryptographic attacks ⓘ |
| implementedIn | reference NTP implementation (ntpd) ⓘ |
| operatesAt | application layer ⓘ |
| operatesOver |
IPv4
ⓘ
IPv6 ⓘ UDP ⓘ |
| provides |
integrity protection for NTP messages
ⓘ
origin authentication for NTP messages ⓘ replay protection for NTP messages ⓘ |
| relatedTo |
NTP symmetric key authentication
ⓘ
Network Time Security (NTS) ⓘ |
| replacedBy | NTS for NTP ⓘ |
| requires |
public key infrastructure
ⓘ
trusted certificate authorities or trusted keys ⓘ |
| securityProperty |
provides cryptographic binding between NTP association and keys
ⓘ
supports group keying for NTP broadcast or multicast modes ⓘ |
| specifiedIn | NTPv4 documentation ⓘ |
| status | deprecated for new NTP deployments ⓘ |
| supports |
public key cryptography
ⓘ
symmetric key cryptography ⓘ |
| usedFor |
authenticating NTP packets
ⓘ
distributing cryptographic keys for NTP ⓘ securing time synchronization in NTP ⓘ |
| uses |
cookie-based key exchange
ⓘ
digital signatures ⓘ message authentication codes ⓘ session keys ⓘ |
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: NTP Autokey Description of subject: NTP Autokey is a cryptographic authentication and key management protocol designed to secure time synchronization in the Network Time Protocol (NTP).
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: NTP Autokey