RFC 2144
E705940
RFC 2144 is an Internet standards document that specifies the CAST-128 (CAST5) symmetric-key block cipher for use in cryptographic applications.
All labels observed (1)
| Label | Occurrences |
|---|---|
| RFC 2144 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7934678 — 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 2144 Context triple: [CAST5, standardizedIn, RFC 2144]
-
A.
RFC 1443
RFC 1443 is an early Internet standards document that specified mechanisms for mapping between X.400 and RFC 822 email addressing and message formats.
-
B.
RFC 2449
RFC 2449 is an Internet standards document that extends the POP3 email protocol with additional capabilities and commands to improve flexibility and interoperability.
-
C.
RFC 1904
RFC 1904 is an Internet standards document that originally defined the textual conventions for SNMPv2 before later being superseded by RFC 3410.
-
D.
RFC 2419
RFC 2419 is an earlier Internet standard related to secure shell (SSH) protocols that was later superseded by RFC 4253.
-
E.
RFC 1654
RFC 1654 is an early Internet standards document that specifies the Point-to-Point Protocol (PPP) for transmitting network layer datagrams over serial point-to-point links.
- 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 2144 Target entity description: RFC 2144 is an Internet standards document that specifies the CAST-128 (CAST5) symmetric-key block cipher for use in cryptographic applications.
-
A.
RFC 1443
RFC 1443 is an early Internet standards document that specified mechanisms for mapping between X.400 and RFC 822 email addressing and message formats.
-
B.
RFC 2449
RFC 2449 is an Internet standards document that extends the POP3 email protocol with additional capabilities and commands to improve flexibility and interoperability.
-
C.
RFC 1904
RFC 1904 is an Internet standards document that originally defined the textual conventions for SNMPv2 before later being superseded by RFC 3410.
-
D.
RFC 2419
RFC 2419 is an earlier Internet standard related to secure shell (SSH) protocols that was later superseded by RFC 4253.
-
E.
RFC 1654
RFC 1654 is an early Internet standards document that specifies the Point-to-Point Protocol (PPP) for transmitting network layer datagrams over serial point-to-point links.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
Internet standards document
ⓘ
Request for Comments ⓘ |
| accessMethod | publicly available on the Internet ⓘ |
| applicationDomain |
cryptographic applications
ⓘ
data encryption ⓘ security protocols ⓘ |
| area | Security ⓘ |
| blockSize | 64 bits ⓘ |
| category | Informational ⓘ |
| cipherType | Feistel network ⓘ |
| defines |
CAST-128 S-boxes
ⓘ
linked to:
S-box
CAST-128 block cipher parameters ⓘ CAST-128 block size ⓘ CAST-128 decryption process ⓘ CAST-128 encryption process ⓘ CAST-128 key schedule ⓘ CAST-128 key sizes ⓘ CAST-128 round functions ⓘ |
| definesAbbreviation | CAST5 for CAST-128 ⓘ |
| definesNotation | CAST-128 algorithm notation ⓘ |
| documentType | technical specification ⓘ |
| format | text ⓘ |
| intendedUse |
general-purpose encryption
ⓘ
software and hardware implementations ⓘ |
| keySizeIncrement | 8 bits ⓘ |
| keySizeRange | 40 to 128 bits ⓘ |
| language | English ⓘ |
| numberOfRounds | 12 or 16 ⓘ |
| obsoletes | none ⓘ |
| publishedBy |
IETF
ⓘ
linked to:
Internet Engineering Task Force
Internet Engineering Task Force ⓘ |
| relatedAlgorithm |
CAST-256
ⓘ
linked to:
CAST6
|
| relatedWork |
CAST family of ciphers
ⓘ
linked to:
CAST5
|
| RFCNumber | 2144 ⓘ |
| securityConsiderations | discusses cryptanalytic strength of CAST-128 ⓘ |
| specifies |
CAST-128
ⓘ
linked to:
The CAST-128 Encryption Algorithm
CAST5 ⓘ symmetric-key block cipher ⓘ |
| standardizes | CAST-128 for Internet use ⓘ |
| status | Informational RFC ⓘ |
| stream | IETF Stream ⓘ |
| subject |
block ciphers
ⓘ
cryptography ⓘ symmetric-key algorithms ⓘ |
| title | The CAST-128 Encryption Algorithm ⓘ |
| updates | none ⓘ |
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 2144 Description of subject: RFC 2144 is an Internet standards document that specifies the CAST-128 (CAST5) symmetric-key block cipher for use in cryptographic applications.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.