PBKDF2
E484055
PBKDF2 is a key derivation function that strengthens passwords by applying repeated hashing with a salt to produce cryptographic keys resistant to brute-force attacks.
All labels observed (4)
| Label | Occurrences |
|---|---|
| PBKDF2 canonical | 3 |
| Argon2i | 1 |
| PKCS #5 | 1 |
| Password-Based Key Derivation Function 2 | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4980147 — 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: PBKDF2 Context triple: [Hashcat, supportsAlgorithm, PBKDF2]
-
A.
SHA-2
SHA-2 is a family of cryptographic hash functions widely used for data integrity, digital signatures, and security protocols on the internet.
-
B.
SHA-256
SHA-256 is a widely used cryptographic hash function from the SHA-2 family that produces a 256-bit hash value for securing data integrity and authentication.
-
C.
PBK
PBK is the common abbreviation for the Phi Beta Kappa Society, the oldest and one of the most prestigious academic honor societies in the United States recognizing excellence in the liberal arts and sciences.
-
D.
SHA-1
SHA-1 is a now-legacy 160-bit cryptographic hash function once widely used for data integrity and digital signatures but today considered insecure due to practical collision attacks.
-
E.
HMAC
HMAC (Hash-based Message Authentication Code) is a cryptographic construction that combines a secret key with a hash function to provide data integrity and authentication.
- 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: PBKDF2 Target entity description: PBKDF2 is a key derivation function that strengthens passwords by applying repeated hashing with a salt to produce cryptographic keys resistant to brute-force attacks.
-
A.
SHA-2
SHA-2 is a family of cryptographic hash functions widely used for data integrity, digital signatures, and security protocols on the internet.
-
B.
SHA-256
SHA-256 is a widely used cryptographic hash function from the SHA-2 family that produces a 256-bit hash value for securing data integrity and authentication.
-
C.
PBK
PBK is the common abbreviation for the Phi Beta Kappa Society, the oldest and one of the most prestigious academic honor societies in the United States recognizing excellence in the liberal arts and sciences.
-
D.
SHA-1
SHA-1 is a now-legacy 160-bit cryptographic hash function once widely used for data integrity and digital signatures but today considered insecure due to practical collision attacks.
-
E.
HMAC
HMAC (Hash-based Message Authentication Code) is a cryptographic construction that combines a secret key with a hash function to provide data integrity and authentication.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
key derivation function
ⓘ
password-based key derivation function ⓘ |
| canUseHashFunction |
SHA-1
ⓘ
SHA-256 ⓘ SHA-384 ⓘ SHA-512 ⓘ |
| category | password-based cryptography ⓘ |
| comparedWith |
Argon2
ⓘ
linked to:
Argon2id
bcrypt ⓘ scrypt ⓘ |
| definedIn |
PKCS #5
ⓘ
RFC 2898 ⓘ RFC 8018 ⓘ |
| designedToResist |
brute-force attacks
ⓘ
dictionary attacks ⓘ rainbow table attacks ⓘ |
| fullName |
Password-Based Key Derivation Function 2
ⓘ
linked to:
PBKDF2
|
| hasParameter |
PRF (pseudorandom function)
ⓘ
c (iteration count) ⓘ dkLen (derived key length) ⓘ salt (random value) ⓘ |
| input |
desired key length
ⓘ
iteration count parameter ⓘ password ⓘ salt value ⓘ |
| introducedIn | 1999 ⓘ |
| output | derived cryptographic key ⓘ |
| property |
configurable work factor via iteration count
ⓘ
deterministic for given parameters ⓘ salt-dependent output ⓘ |
| purpose |
key derivation from passwords
ⓘ
key stretching ⓘ password hashing ⓘ |
| securityDependsOn |
iteration count selection
ⓘ
salt length and randomness ⓘ underlying hash function strength ⓘ |
| standardizedBy |
IETF
ⓘ
linked to:
Internet Engineering Task Force
RSA Laboratories ⓘ
linked to:
RSA Security
|
| typicallyUses | HMAC ⓘ |
| usedFor |
disk encryption key derivation
ⓘ
key derivation in cryptographic protocols ⓘ password storage ⓘ |
| usedIn |
PKCS #12
ⓘ
WPA2 ⓘ
linked to:
Wi‑Fi CERTIFIED WPA2
WPA3 ⓘ
linked to:
Wi‑Fi CERTIFIED WPA3
many password managers ⓘ |
| uses |
iteration count
ⓘ
pseudorandom function ⓘ salt ⓘ |
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: PBKDF2 Description of subject: PBKDF2 is a key derivation function that strengthens passwords by applying repeated hashing with a salt to produce cryptographic keys resistant to brute-force attacks.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: PBKDF2