TOTP RFC 6238
E937611
TOTP RFC 6238 is the Internet standard that defines time-based one-time password generation for two-factor authentication systems.
All labels observed (4)
| Label | Occurrences |
|---|---|
| TOTP | 1 |
| TOTP RFC 6238 canonical | 1 |
| TOTP: Time-Based One-Time Password Algorithm | 1 |
| Time-Based One-Time Password (TOTP) algorithm | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T11654879 — 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: TOTP RFC 6238 Context triple: [Microsoft Authenticator, supportsProtocol, TOTP RFC 6238]
-
A.
FIDO U2F
FIDO U2F is an open authentication standard that enables strong, phishing-resistant two-factor authentication using dedicated hardware security keys.
-
B.
FIDO2
FIDO2 is an open authentication standard that enables secure, passwordless logins using public-key cryptography across web and native applications.
-
C.
OTP
OTP is the acronym commonly used for the Office of the Prosecutor of the International Criminal Court, the body responsible for investigating and prosecuting individuals for international crimes such as genocide, war crimes, and crimes against humanity.
-
D.
OTP
OTP is the abbreviation for the U.S. federal Office of Telecommunications Policy, a former executive office responsible for shaping national telecommunications policy.
-
E.
OTP
OTP is the three-letter IATA airport code for Henri Coandă International Airport, the main international airport serving Bucharest, Romania.
- 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: TOTP RFC 6238 Target entity description: TOTP RFC 6238 is the Internet standard that defines time-based one-time password generation for two-factor authentication systems.
-
A.
FIDO U2F
FIDO U2F is an open authentication standard that enables strong, phishing-resistant two-factor authentication using dedicated hardware security keys.
-
B.
FIDO2
FIDO2 is an open authentication standard that enables secure, passwordless logins using public-key cryptography across web and native applications.
-
C.
OTP
OTP is the acronym commonly used for the Office of the Prosecutor of the International Criminal Court, the body responsible for investigating and prosecuting individuals for international crimes such as genocide, war crimes, and crimes against humanity.
-
D.
OTP
OTP is the abbreviation for the U.S. federal Office of Telecommunications Policy, a former executive office responsible for shaping national telecommunications policy.
-
E.
OTP
OTP is the three-letter IATA airport code for Henri Coandă International Airport, the main international airport serving Bucharest, Romania.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
Internet standard
ⓘ
RFC ⓘ time-based one-time password algorithm specification ⓘ |
| allows |
SHA-1
ⓘ
SHA-256 ⓘ SHA-512 ⓘ |
| area | Security ⓘ |
| basedOn |
HMAC-Based One-Time Password (HOTP) algorithm
ⓘ
linked to:
HOTP RFC 4226
|
| category | Informational ⓘ |
| defines |
Time-Based One-Time Password (TOTP) algorithm
ⓘ
linked to:
TOTP RFC 6238
client and server time synchronization requirements ⓘ interoperability requirements for TOTP ⓘ key provisioning requirements ⓘ resynchronization procedures ⓘ security considerations for TOTP ⓘ test vectors for TOTP implementations ⓘ |
| extends | HOTP RFC 4226 ⓘ |
| language | English ⓘ |
| obsoletes | none ⓘ |
| organization | IETF Token Authentication community ⓘ |
| primaryUse |
multi-factor authentication
ⓘ
two-factor authentication ⓘ |
| publishedBy |
IETF
ⓘ
linked to:
Internet Engineering Task Force
Internet Engineering Task Force ⓘ |
| recommends |
30-second time step
ⓘ
6-digit OTP values ⓘ |
| relatedTo |
HOTP RFC 4226
ⓘ
OATH Initiative ⓘ |
| RFCNumber | 6238 ⓘ |
| specifies |
T0 initial counter time
ⓘ
output digit length for OTP ⓘ time step X for moving factor ⓘ use of Unix time in seconds ⓘ validation window for OTP verification ⓘ |
| standardizes | time-based one-time password generation ⓘ |
| status | Best Current Practice for TOTP-like systems in practice ⓘ |
| stream |
IETF
ⓘ
linked to:
Internet Engineering Task Force
|
| title |
TOTP: Time-Based One-Time Password Algorithm
ⓘ
linked to:
TOTP RFC 6238
|
| topic |
authentication protocols
ⓘ
cryptography ⓘ |
| updates | none ⓘ |
| usedBy |
authentication servers
ⓘ
hardware tokens ⓘ mobile authenticator applications ⓘ web services implementing two-factor authentication ⓘ |
| uses |
HMAC
ⓘ
current time as moving factor ⓘ shared secret key ⓘ |
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: TOTP RFC 6238 Description of subject: TOTP RFC 6238 is the Internet standard that defines time-based one-time password generation for two-factor authentication systems.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
Microsoft Authenticator app
linked to: TOTP RFC 6238
linked to: TOTP RFC 6238
linked to: TOTP RFC 6238