ACME v2
E556219
ACME v2 is the second major version of the ACME protocol used by Let’s Encrypt and others to automate the issuance and management of TLS/SSL certificates on the web.
All labels observed (2)
| Label | Occurrences |
|---|---|
| ACME v2 canonical | 1 |
| Let’s Encrypt ACME API | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5919725 — 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: ACME v2 Context triple: [Let’s Encrypt, ACMEVersion, ACME v2]
-
A.
Let’s Encrypt
Let’s Encrypt is a free, automated, and open certificate authority that provides TLS/SSL certificates to enable secure HTTPS connections for websites worldwide.
-
B.
Caddy
Caddy is a central character in William Faulkner’s novel "The Sound and the Fury," known for her complex role within the Compson family and her symbolic significance to the story’s themes of loss and decay.
-
C.
Egmont Secure Web
Egmont Secure Web is a secure online platform used by the Egmont Group to facilitate confidential information sharing and collaboration among financial intelligence units worldwide.
-
D.
Cloud Armor
Cloud Armor is Google Cloud’s distributed web application firewall and DDoS protection service that helps secure applications and services from online attacks.
-
E.
Zscaler
Zscaler is a cloud-based information security company known for providing secure access and zero-trust networking solutions to enterprises worldwide.
- 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: ACME v2 Target entity description: ACME v2 is the second major version of the ACME protocol used by Let’s Encrypt and others to automate the issuance and management of TLS/SSL certificates on the web.
-
A.
Let’s Encrypt
Let’s Encrypt is a free, automated, and open certificate authority that provides TLS/SSL certificates to enable secure HTTPS connections for websites worldwide.
-
B.
Caddy
Caddy is a central character in William Faulkner’s novel "The Sound and the Fury," known for her complex role within the Compson family and her symbolic significance to the story’s themes of loss and decay.
-
C.
Egmont Secure Web
Egmont Secure Web is a secure online platform used by the Egmont Group to facilitate confidential information sharing and collaboration among financial intelligence units worldwide.
-
D.
Cloud Armor
Cloud Armor is Google Cloud’s distributed web application firewall and DDoS protection service that helps secure applications and services from online attacks.
-
E.
Zscaler
Zscaler is a cloud-based information security company known for providing secure access and zero-trust networking solutions to enterprises worldwide.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
ACME protocol version
ⓘ
certificate management protocol ⓘ network protocol ⓘ |
| definedIn | RFC 8555 ⓘ |
| designedFor |
automated certificate management
ⓘ
web servers ⓘ |
| enables |
fully automated certificate issuance
ⓘ
fully automated certificate renewal ⓘ programmatic certificate revocation ⓘ zero-touch certificate deployment ⓘ |
| hasFeature |
account management endpoint
ⓘ
authorization objects ⓘ certificate revocation endpoint ⓘ challenge objects ⓘ directory endpoint ⓘ finalize endpoint ⓘ order-based issuance flow ⓘ |
| improvesUpon |
ACME v1 extensibility
ⓘ
ACME v1 scalability ⓘ ACME v1 security model ⓘ ACME v1 wildcard support ⓘ |
| relatedTo |
Let’s Encrypt ACME API
ⓘ
linked to:
ACME v2
PKI ⓘ SSL ⓘ TLS ⓘ X.509 certificates ⓘ |
| standardizedBy |
IETF
ⓘ
linked to:
Internet Engineering Task Force
|
| successorOf | ACME v1 ⓘ |
| supports |
DNS-01 challenge
ⓘ
HTTP-01 challenge ⓘ TLS-ALPN-01 challenge ⓘ wildcard certificates ⓘ |
| usedBy |
ACME clients
ⓘ
DevOps automation tools ⓘ Let’s Encrypt ⓘ private certificate authorities ⓘ public certificate authorities ⓘ web hosting providers ⓘ |
| usedFor |
automated issuance of SSL certificates
ⓘ
automated issuance of TLS certificates ⓘ automated renewal of SSL certificates ⓘ automated renewal of TLS certificates ⓘ certificate lifecycle management ⓘ domain validation ⓘ |
| uses |
HTTPS
ⓘ
JSON Web Signature ⓘ JSON Web Token ⓘ
linked to:
JSON Web Tokens (JWT)
REST-style 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: ACME v2 Description of subject: ACME v2 is the second major version of the ACME protocol used by Let’s Encrypt and others to automate the issuance and management of TLS/SSL certificates on the web.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.