For the purposes of the present document, the terms and definitions given in TR 21.905
and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905
Primary MCPTT System:
MCPTT system where the MCPTT User Profile of an MCPTT User is defined.
Partner MCPTT System:
Allied MCPTT system that provides MCPTT Services to an MCPTT User based on the MCPTT User Profile that is defined in the Primary MCPTT System of that MCPTT User.
A security domain is a group of MCX users who share common security requirements and policies for their communications. From a technical perspective, users within a security domain share a KMS and KMS certificate. MCX users may be members of one or more security domains.
Home Security Domain:
The MCX user's primary security domain.
External Security Domain:
A security domain that is not the user's home security domain. Secure communications with an external security domain may or may not be permitted by the home security domain.
The KMS that acts as the root of trust of the Home Security Domain.
The KMS which acts as the root of trust for a specific External Security Domain.
MC Security Gateway (SeGy):
A certificate required to communicate with a security domain to support identity-based cryptography. This differs from X.509 certificates used for traditional PKI. See Annex D.3.1 within TS 33.179
A function which terminates MC security to allow for interworking with external systems that do not support mission critical security mechanisms.
For the purposes of the present document, the abbreviations given in TR 21.905
and the following apply.
An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905
Common Services Core
Client-Server Key Identifier
Denial of Service
Enhanced Mission Critical Push-to-Talk
Group Controlling Server
Group Data Key
Group Data Key Identifier
Group Master Key
Group Management Server
Identity Management Server
JSON Web Signature
JSON Web Token
Key Derivation Function
Key For Control Signalling
Key Management Server
Multimedia Broadcast/Multicast Service
Multimedia Broadcast Single Frequency Network
Mission Critical Communication Interworking
Mission Critical Data
Mission Critical Push to Talk
Mission Critical SECurity
Mission Critical Study on Migration and Interconnect
Mission Critical Video
Mission Critical Services
Multicast Key Floor Control
MBMS Sub- Channel Control Key
Multicast Signalling Key
Private Call Key
Private Data Key
Private Data Key Identifier
Participating Function Key
Public Key Infrastructure
Real-Time Transport Protocol
Short Data Services
MC Security Gateway
SIP Protection Key
Secure Real-Time Transport Control Protocol
Secure Real-Time Transport Protocol
Temporary Group Master Key
Temporary Mobile Group Identity