SHA-0
E434686
SHA-0 is an early, now-obsolete cryptographic hash function in the Secure Hash Algorithm family, known for its structural weaknesses and subsequent replacement by SHA-1.
All labels observed (1)
| Label | Occurrences |
|---|---|
| SHA-0 canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T4381640 — 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: SHA-0 Context triple: [Merkle–Damgård construction, usedIn, SHA-0]
-
A.
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.
-
B.
RIPEMD-160
RIPEMD-160 is a 160-bit cryptographic hash function designed as an alternative to SHA-1, commonly used for data integrity and security applications.
-
C.
Merkle–Damgård construction
The Merkle–Damgård construction is a fundamental method for building collision-resistant cryptographic hash functions from fixed-size compression functions, used in many classic hash algorithms like MD5 and SHA-1.
-
D.
MD5
MD5 is a widely known but now cryptographically broken 128-bit hash function formerly used for checksums, data integrity, and security applications.
-
E.
SHA
SHA is the IATA airport code for Shanghai Hongqiao International Airport, a major domestic and regional aviation hub serving Shanghai, China.
- 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: SHA-0 Target entity description: SHA-0 is an early, now-obsolete cryptographic hash function in the Secure Hash Algorithm family, known for its structural weaknesses and subsequent replacement by SHA-1.
-
A.
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.
-
B.
RIPEMD-160
RIPEMD-160 is a 160-bit cryptographic hash function designed as an alternative to SHA-1, commonly used for data integrity and security applications.
-
C.
Merkle–Damgård construction
The Merkle–Damgård construction is a fundamental method for building collision-resistant cryptographic hash functions from fixed-size compression functions, used in many classic hash algorithms like MD5 and SHA-1.
-
D.
MD5
MD5 is a widely known but now cryptographically broken 128-bit hash function formerly used for checksums, data integrity, and security applications.
-
E.
SHA
SHA is the IATA airport code for Shanghai Hongqiao International Airport, a major domestic and regional aviation hub serving Shanghai, China.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
Secure Hash Algorithm
ⓘ
cryptographic hash function ⓘ hash function ⓘ |
| alsoKnownAs | SHA ⓘ |
| basedOn | MD4 design principles ⓘ |
| belongsToCategory |
NIST cryptographic standards
ⓘ
linked to:
NIST cryptographic standards framework
broken hash functions ⓘ |
| blockSize | 512 bits ⓘ |
| collisionComplexityReported |
2^61
ⓘ
significantly less than brute force 2^80 ⓘ |
| collisionResistance | broken ⓘ |
| definedOver | binary strings of arbitrary length ⓘ |
| designDifferenceFrom |
SHA-1
ⓘ
SHA-1 message schedule rotation change ⓘ |
| designFlaw | message schedule omission of one bitwise rotation ⓘ |
| developedBy | National Security Agency ⓘ |
| field |
cryptography
ⓘ
information security ⓘ |
| hasInitialValue | fixed 160-bit IV ⓘ |
| hasVulnerability |
collision attacks
ⓘ
differential cryptanalysis ⓘ |
| influenced |
cryptanalysis of SHA-1
ⓘ
design of later SHA-2 family ⓘ |
| introducedByStandard |
FIPS 180: Secure Hash Standard
ⓘ
linked to:
Secure Hash Standard
|
| notRecommendedFor | new cryptographic applications ⓘ |
| operatesOn | 512-bit message blocks ⓘ |
| outputSize | 160 bits ⓘ |
| paddingMethod | MD-strengthening style padding ⓘ |
| partOf | SHA family ⓘ |
| preimageResistance | weakened ⓘ |
| producesDigest | 160-bit message digest ⓘ |
| publicationYear | 1993 ⓘ |
| publishedInStandard |
FIPS 180
ⓘ
linked to:
FIPS 180-4
|
| replacedBy | SHA-1 ⓘ |
| roundFunctionCount | 80 rounds ⓘ |
| securityLevelIntended | 80-bit collision resistance ⓘ |
| standardizedBy | NIST ⓘ |
| standardRegion |
United States
ⓘ
linked to:
United States of America
|
| status |
broken
ⓘ
obsolete ⓘ |
| successor | SHA-1 ⓘ |
| usedFor |
digital signatures (historically)
ⓘ
message integrity (historically) ⓘ |
| usesConstruction | Merkle–Damgård construction ⓘ |
| withdrawnByStandard | FIPS 180-1 ⓘ |
| wordSize | 32 bits ⓘ |
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: SHA-0 Description of subject: SHA-0 is an early, now-obsolete cryptographic hash function in the Secure Hash Algorithm family, known for its structural weaknesses and subsequent replacement by SHA-1.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.