ZRTP
E127265
ZRTP is a cryptographic key-agreement protocol designed to enable end-to-end encryption for real-time voice and video communications over RTP-based systems.
All labels observed (5)
| Label | Occurrences |
|---|---|
| ZRTP canonical | 8 |
| ZRTP protocol | 2 |
| ZRTP key agreement protocol | 1 |
| ZRTP: Media Path Key Agreement for Unicast Secure RTP | 1 |
| Zimmermann Real-time Transport Protocol | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1096772 — 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: ZRTP Context triple: [Secure Real-time Transport Protocol, commonlyUsedWith, ZRTP]
-
A.
SRTP for secure media transport
SRTP for secure media transport is a security protocol that encrypts and authenticates real-time audio and video streams, commonly used in VoIP and WebRTC communications.
-
B.
Mopria
Mopria is a universal mobile printing standard that enables seamless, driverless printing from devices like smartphones, tablets, and Chromebooks to compatible printers.
-
C.
RTP
RTP (Real-time Transport Protocol) is a network protocol designed for delivering audio and video over IP networks in real-time, commonly used in streaming, VoIP, and multimedia communication systems.
-
D.
TLS
TLS (Transport Layer Security) is a cryptographic protocol that secures data transmitted over networks by providing encryption, authentication, and integrity between communicating applications.
-
E.
PGP
PGP (Pretty Good Privacy) is an encryption program that provides cryptographic privacy and authentication for data communication, most notably for securing emails and files.
- 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: ZRTP Target entity description: ZRTP is a cryptographic key-agreement protocol designed to enable end-to-end encryption for real-time voice and video communications over RTP-based systems.
-
A.
SRTP for secure media transport
SRTP for secure media transport is a security protocol that encrypts and authenticates real-time audio and video streams, commonly used in VoIP and WebRTC communications.
-
B.
Mopria
Mopria is a universal mobile printing standard that enables seamless, driverless printing from devices like smartphones, tablets, and Chromebooks to compatible printers.
-
C.
RTP
RTP (Real-time Transport Protocol) is a network protocol designed for delivering audio and video over IP networks in real-time, commonly used in streaming, VoIP, and multimedia communication systems.
-
D.
TLS
TLS (Transport Layer Security) is a cryptographic protocol that secures data transmitted over networks by providing encryption, authentication, and integrity between communicating applications.
-
E.
PGP
PGP (Pretty Good Privacy) is an encryption program that provides cryptographic privacy and authentication for data communication, most notably for securing emails and files.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
VoIP security protocol
ⓘ
cryptographic key-agreement protocol ⓘ key exchange protocol ⓘ |
| basedOn | Diffie–Hellman key exchange ⓘ |
| designedBy |
Alan Johnston
ⓘ
Jon Callas ⓘ Phil Zimmermann ⓘ |
| doesNotRequire |
PKI
ⓘ
pre-shared keys ⓘ |
| feature |
SAS verbal comparison
ⓘ
cache of retained secrets ⓘ opportunistic encryption ⓘ |
| fullName |
Zimmermann Real-time Transport Protocol
ⓘ
linked to:
ZRTP
|
| negotiates |
SRTP master keys
ⓘ
SRTP salt keys ⓘ |
| operatesOver |
RTP
ⓘ
SRTP ⓘ
linked to:
SRTP for secure media transport
|
| primaryUse |
VoIP
ⓘ
multimedia sessions ⓘ |
| provides |
key agreement
ⓘ
man-in-the-middle attack detection ⓘ media path keying ⓘ perfect forward secrecy ⓘ |
| publicationYear | 2011 ⓘ |
| specifiedIn | RFC 6189 ⓘ |
| standardizedBy |
IETF
ⓘ
linked to:
Internet Engineering Task Force
|
| supports |
end-to-end encryption
ⓘ
real-time communication ⓘ video communication ⓘ voice communication ⓘ |
| supportsCipher |
AES
ⓘ
linked to:
Advanced Encryption Standard
Salsa20 ⓘ Twofish ⓘ |
| supportsDHGroup |
3072-bit MODP
ⓘ
4096-bit MODP ⓘ P-256 ⓘ P-384 ⓘ P-521 ⓘ |
| supportsHash |
SHA-256
ⓘ
SHA-384 ⓘ SHA-512 ⓘ |
| usedBy |
Jitsi
ⓘ
Linphone ⓘ Twinkle ⓘ Zfone ⓘ |
| uses |
Short Authentication String
ⓘ
ephemeral Diffie–Hellman keys ⓘ hash commitment ⓘ key continuity ⓘ |
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: ZRTP Description of subject: ZRTP is a cryptographic key-agreement protocol designed to enable end-to-end encryption for real-time voice and video communications over RTP-based systems.
Referenced by (13)
Full triples — surface form annotated when it differs from this entity's canonical label.