SIGMA key exchange protocol
E831957
The SIGMA key exchange protocol is a cryptographic protocol designed to provide secure authenticated key exchange with strong security guarantees and has been widely used as the basis for protocols like IKE in IPsec.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Station-to-Station (STS) protocol | 2 |
| Internet Key Exchange Protocol Version 2 | 1 |
| SIGMA key exchange protocol canonical | 1 |
| SIGMA with preshared keys | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T9961790 — 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: SIGMA key exchange protocol Context triple: [Hugo Krawczyk, knownFor, SIGMA key exchange protocol]
-
A.
Diffie–Hellman key exchange
Diffie–Hellman key exchange is a foundational cryptographic protocol that enables two parties to securely establish a shared secret over an insecure communication channel.
-
B.
The Sigma Protocol
The Sigma Protocol is a posthumously published thriller novel by Robert Ludlum that follows a man uncovering a vast global conspiracy tied to secret financial and political powers.
-
C.
Dragonfly key exchange
Dragonfly key exchange is a password-authenticated key exchange (PAKE) protocol designed to provide secure mutual authentication and key establishment resistant to offline dictionary attacks.
-
D.
Curve25519-based schemes
Curve25519-based schemes are cryptographic protocols and algorithms that use the Curve25519 elliptic curve to provide efficient, high-security public-key operations such as key exchange and digital signatures.
-
E.
Secrecy, Authentication, and Public Key Systems
"Secrecy, Authentication, and Public Key Systems" is Ralph Merkle's influential doctoral thesis that helped lay the foundations of modern public-key cryptography and secure communication 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: SIGMA key exchange protocol Target entity description: The SIGMA key exchange protocol is a cryptographic protocol designed to provide secure authenticated key exchange with strong security guarantees and has been widely used as the basis for protocols like IKE in IPsec.
-
A.
Diffie–Hellman key exchange
Diffie–Hellman key exchange is a foundational cryptographic protocol that enables two parties to securely establish a shared secret over an insecure communication channel.
-
B.
The Sigma Protocol
The Sigma Protocol is a posthumously published thriller novel by Robert Ludlum that follows a man uncovering a vast global conspiracy tied to secret financial and political powers.
-
C.
Dragonfly key exchange
Dragonfly key exchange is a password-authenticated key exchange (PAKE) protocol designed to provide secure mutual authentication and key establishment resistant to offline dictionary attacks.
-
D.
Curve25519-based schemes
Curve25519-based schemes are cryptographic protocols and algorithms that use the Curve25519 elliptic curve to provide efficient, high-security public-key operations such as key exchange and digital signatures.
-
E.
Secrecy, Authentication, and Public Key Systems
"Secrecy, Authentication, and Public Key Systems" is Ralph Merkle's influential doctoral thesis that helped lay the foundations of modern public-key cryptography and secure communication protocols.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
authenticated key exchange protocol
ⓘ
cryptographic key exchange protocol ⓘ security protocol ⓘ |
| addressesWeaknessOf | naive signed Diffie–Hellman ⓘ |
| considered | a de facto standard design for authenticated Diffie–Hellman protocols ⓘ |
| designedFor |
authenticated key exchange
ⓘ
key establishment ⓘ mutual authentication ⓘ |
| developedInField | applied cryptography ⓘ |
| hasAcronym | SIGMA ⓘ |
| hasDesignFeature |
identity protection
ⓘ
protection of identities under passive eavesdropping ⓘ separation of authentication and key confirmation ⓘ sign-then-MAC structure ⓘ support for certificate-based authentication ⓘ support for public-key signatures ⓘ |
| hasFullName | SIGn-and-MAc key exchange protocol ⓘ |
| hasMessageFlow | two-pass Diffie–Hellman exchange with authenticated payloads ⓘ |
| hasProperty |
binds session keys to authenticated identities
ⓘ
binds session keys to protocol transcript ⓘ supports mutual authentication in standard variants ⓘ supports negotiation of cryptographic algorithms ⓘ supports unilateral authentication in some variants ⓘ |
| hasSecurityGoal |
key indistinguishability
ⓘ
resistance to reflection attacks ⓘ resistance to replay attacks ⓘ strong security under active attacks ⓘ |
| hasSecurityModel | provable security in the Bellare–Rogaway style model ⓘ |
| hasVariant |
SIGMA with identity protection
ⓘ
SIGMA-I ⓘ
linked to:
SIGMA
SIGMA-R ⓘ |
| improvesOn |
Station-to-Station (STS) protocol
ⓘ
linked to:
SIGMA key exchange protocol
|
| inspired |
Internet Key Exchange (IKE)
ⓘ
linked to:
IKEv2
|
| providesProperty |
explicit entity authentication
ⓘ
forward secrecy ⓘ resistance to identity misbinding ⓘ resistance to key-compromise impersonation ⓘ resistance to man-in-the-middle attacks ⓘ |
| relatedTo |
Station-to-Station (STS) protocol
ⓘ
linked to:
SIGMA key exchange protocol
|
| usedAsBasisFor |
Internet Key Exchange version 1 (IKEv1)
ⓘ
linked to:
IKEv1
Internet Key Exchange version 2 (IKEv2) ⓘ
linked to:
Internet Key Exchange Protocol Version 2
|
| usedInContext |
IPsec
ⓘ
secure channel establishment ⓘ virtual private networks ⓘ |
| usesPrimitive |
Diffie–Hellman key exchange
ⓘ
cryptographic hash functions ⓘ digital signatures ⓘ message authentication codes ⓘ |
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: SIGMA key exchange protocol Description of subject: The SIGMA key exchange protocol is a cryptographic protocol designed to provide secure authenticated key exchange with strong security guarantees and has been widely used as the basis for protocols like IKE in IPsec.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: SIGMA key exchange protocol
linked to: SIGMA key exchange protocol
linked to: SIGMA key exchange protocol
linked to: SIGMA key exchange protocol