RFC 8439
E50666
RFC 8439 is an IETF standard that specifies the ChaCha20 stream cipher and the Poly1305 message authentication code, defining the ChaCha20-Poly1305 AEAD construction widely used in modern cryptographic protocols.
All labels observed (2)
How this entity was disambiguated
This entity first appeared as the object of triple T338739 — 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: RFC 8439 Context triple: [ChaCha20, standardizedIn, RFC 8439]
-
A.
RFC 7539
RFC 7539 is an IETF standard that specifies the ChaCha20 stream cipher and the Poly1305 message authentication code for use in secure Internet protocols.
-
B.
RFC 8332
RFC 8332 is an Internet Engineering Task Force (IETF) standard that updates and replaces earlier SSH protocol specifications to enhance security and functionality.
-
C.
RFC 7143
RFC 7143 is the Internet Engineering Task Force (IETF) standard that defines the updated core specification for the iSCSI (Internet Small Computer Systems Interface) protocol used for block-level storage over IP networks.
-
D.
RFC 7950
RFC 7950 is the IETF specification that standardizes the YANG 1.1 data modeling language used for modeling configuration and state data in network management protocols.
-
E.
RFC 7919
RFC 7919 is an Internet standard that specifies the use of predefined Diffie–Hellman groups for secure key exchange in TLS and related protocols.
- 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: RFC 8439 Target entity description: RFC 8439 is an IETF standard that specifies the ChaCha20 stream cipher and the Poly1305 message authentication code, defining the ChaCha20-Poly1305 AEAD construction widely used in modern cryptographic protocols.
-
A.
RFC 7539
RFC 7539 is an IETF standard that specifies the ChaCha20 stream cipher and the Poly1305 message authentication code for use in secure Internet protocols.
-
B.
RFC 8332
RFC 8332 is an Internet Engineering Task Force (IETF) standard that updates and replaces earlier SSH protocol specifications to enhance security and functionality.
-
C.
RFC 7143
RFC 7143 is the Internet Engineering Task Force (IETF) standard that defines the updated core specification for the iSCSI (Internet Small Computer Systems Interface) protocol used for block-level storage over IP networks.
-
D.
RFC 7950
RFC 7950 is the IETF specification that standardizes the YANG 1.1 data modeling language used for modeling configuration and state data in network management protocols.
-
E.
RFC 7919
RFC 7919 is an Internet standard that specifies the use of predefined Diffie–Hellman groups for secure key exchange in TLS and related protocols.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
IETF Request for Comments
ⓘ
cryptography standard ⓘ |
| algorithmDesigner | Daniel J. Bernstein ⓘ |
| area | Security ⓘ |
| author |
A. Langley
ⓘ
Yoav Nir ⓘ
surface form:
Y. Nir
|
| category | Standards Track ⓘ |
| defines |
AEAD_CHACHA20_POLY1305
ⓘ
AEAD_CHACHA20_POLY1305 ⓘ
surface form:
AEAD_XCHACHA20_POLY1305
ChaCha20 ⓘ AEAD_CHACHA20_POLY1305 ⓘ
surface form:
ChaCha20-Poly1305
Poly1305 ⓘ |
| intendedUse |
IPsec
ⓘ
Internet protocols ⓘ SSH ⓘ TLS ⓘ |
| isPartOf |
RFCs
ⓘ
surface form:
RFC series
|
| language | English ⓘ |
| month | June ⓘ |
| number | 8439 ⓘ |
| obsoletes | RFC 7539 ⓘ |
| publicationDate | 2018-06 ⓘ |
| publishedBy |
Internet Engineering Task Force
ⓘ
surface form:
IETF
Internet Engineering Task Force ⓘ |
| recommends |
256-bit key for ChaCha20
ⓘ
96-bit nonce for ChaCha20-Poly1305 ⓘ |
| securityProperty | authenticated encryption with associated data ⓘ |
| specifies |
AEAD interface for ChaCha20-Poly1305
ⓘ
ChaCha20 ⓘ
surface form:
ChaCha20 stream cipher
AEAD_CHACHA20_POLY1305 ⓘ
surface form:
ChaCha20-Poly1305 AEAD construction
IETF variant of ChaCha20 ⓘ IETF variant of Poly1305 ⓘ Poly1305 message authentication code ⓘ XChaCha20-Poly1305 AEAD construction ⓘ key derivation considerations for ChaCha20-Poly1305 ⓘ nonce format for ChaCha20-Poly1305 ⓘ test vectors for ChaCha20 ⓘ test vectors for ChaCha20-Poly1305 ⓘ test vectors for Poly1305 ⓘ usage guidelines for ChaCha20-Poly1305 in IETF protocols ⓘ |
| status | Proposed Standard ⓘ |
| stream |
the internet
ⓘ
surface form:
Internet
|
| title |
AEAD_CHACHA20_POLY1305
ⓘ
surface form:
ChaCha20 and Poly1305 for IETF Protocols
|
| updates | RFC 7905 ⓘ |
| workingGroup |
CFRG
ⓘ
Crypto Forum Research Group ⓘ |
| year | 2018 ⓘ |
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: RFC 8439 Description of subject: RFC 8439 is an IETF standard that specifies the ChaCha20 stream cipher and the Poly1305 message authentication code, defining the ChaCha20-Poly1305 AEAD construction widely used in modern cryptographic protocols.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
RFC 7539
subject surface form:
ChaCha20