Signal protocol Double Ratchet
E831073
Signal protocol Double Ratchet is a cryptographic key management algorithm that provides end-to-end encryption with forward secrecy and post-compromise security for secure messaging applications.
All labels observed (5)
How this entity was disambiguated
This entity first appeared as the object of triple T9931842 — 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: Signal protocol Double Ratchet Context triple: [Curve25519-based schemes, supportsProtocol, Signal protocol Double Ratchet]
-
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.
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.
-
C.
MTProto encryption protocol
MTProto encryption protocol is Telegram’s custom-designed cryptographic protocol that secures user data and message transmission across its messaging platform.
-
D.
DTLS-SRTP
DTLS-SRTP is a security protocol framework that uses Datagram Transport Layer Security to negotiate keys and provide encryption and authentication for Secure Real-time Transport Protocol media streams, commonly used in VoIP and WebRTC.
-
E.
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.
- 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: Signal protocol Double Ratchet Target entity description: Signal protocol Double Ratchet is a cryptographic key management algorithm that provides end-to-end encryption with forward secrecy and post-compromise security for secure messaging applications.
-
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.
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.
-
C.
MTProto encryption protocol
MTProto encryption protocol is Telegram’s custom-designed cryptographic protocol that secures user data and message transmission across its messaging platform.
-
D.
DTLS-SRTP
DTLS-SRTP is a security protocol framework that uses Datagram Transport Layer Security to negotiate keys and provide encryption and authentication for Secure Real-time Transport Protocol media streams, commonly used in VoIP and WebRTC.
-
E.
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.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
component of the Signal Protocol
ⓘ
cryptographic key management algorithm ⓘ key ratcheting algorithm ⓘ |
| basedOn | Axolotl Ratchet ⓘ |
| category |
applied cryptography
ⓘ
secure messaging technology ⓘ |
| designedFor | end-to-end encryption ⓘ |
| developedBy |
Moxie Marlinspike
ⓘ
Trevor Perrin ⓘ |
| documentedIn |
The Double Ratchet Algorithm specification by Trevor Perrin and Moxie Marlinspike
ⓘ
linked to:
Signal protocol Double Ratchet
|
| ensuresProperty |
compromise of current keys does not necessarily reveal future messages
ⓘ
compromise of current keys does not reveal past messages ⓘ deniability at the protocol level (in Signal protocol context) ⓘ per-message key update ⓘ |
| firstPublished | around 2013 ⓘ |
| hasComponent |
Diffie–Hellman ratchet
ⓘ
linked to:
Diffie–Hellman key exchange
symmetric-key ratchet ⓘ |
| hasProperty |
designed for mobile messaging
ⓘ
open specification ⓘ resistant to key compromise in long-lived sessions ⓘ supports one-to-one conversations ⓘ |
| influenced | other modern secure messaging protocols ⓘ |
| maintainedBy |
Signal Foundation (as part of Signal Protocol)
ⓘ
linked to:
Signal protocol
|
| partOf |
Signal Protocol
ⓘ
linked to:
Signal protocol Double Ratchet
|
| providesProperty |
forward secrecy
ⓘ
post-compromise security ⓘ |
| roleInSignalProtocol | manages ongoing session keys after initial X3DH handshake ⓘ |
| securityDependsOn |
correct implementation of key deletion
ⓘ
hardness of the Diffie–Hellman problem ⓘ security of underlying symmetric ciphers ⓘ |
| supportsProperty |
asynchronous messaging
ⓘ
lost message recovery (limited) ⓘ out-of-order message delivery ⓘ |
| usedIn |
Element/Matrix (in Olm/Megolm designs, conceptually related)
ⓘ
Facebook Messenger Secret Conversations ⓘ Google RCS (when using Signal protocol-based E2EE) ⓘ
linked to:
RCS
Session messenger ⓘ Signal secure messaging protocol ⓘ
linked to:
Signal protocol
Skype end-to-end encrypted conversations ⓘ Threema ⓘ WhatsApp end-to-end encryption ⓘ Wire messenger ⓘ |
| usedWith | X3DH key agreement protocol in Signal ⓘ |
| usesPrimitive |
Diffie–Hellman key exchange
ⓘ
authenticated encryption with associated data ⓘ key derivation function ⓘ message authentication code ⓘ symmetric-key cryptography ⓘ |
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: Signal protocol Double Ratchet Description of subject: Signal protocol Double Ratchet is a cryptographic key management algorithm that provides end-to-end encryption with forward secrecy and post-compromise security for secure messaging applications.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Signal protocol Double Ratchet
Signal protocol Double Ratchet
→
documentedIn
→
The Double Ratchet Algorithm specification by Trevor Perrin and Moxie Marlinspike
ⓘ
linked to: Signal protocol Double Ratchet
subject linked to:
Signal protocol
linked to: Signal protocol Double Ratchet
subject linked to:
Signal protocol
linked to: Signal protocol Double Ratchet