3 Definitions and abbreviations

33.1793GPPRelease 13Security of Mission Critical Push To Talk (MCPTT) over LTETS

3.1 Definitions

For the purposes of the present document, the terms and definitions given in 3GPP TR 21.905 [1] and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in 3GPP TR 21.905 [1].

Floor: Floor(x) is the largest integer smaller than or equal to x.

3.2 Abbreviations

For the purposes of the present document, the abbreviations given in 3GPP TR 21.905 [1] and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in 3GPP TR 21.905 [1].

CSC Common Services Core

GBA Generic Bootstrapping Architecture

GMK Group Master Key

GMK-ID Group Master Key Identifier

GMS Group Management Server

GUK-ID Group User Key Identifier

IdM Identity Management

IdMS Identity Management Server

KMS Key Management Server

MBCP Media Burst Control Protocol

MCPTT Mission Critical Push to Talk

MKI Master Key Identifier

MSCCK MBMS subchannel control key

NGMI Next Generation Mobile Intelligence

OIDC OpenID Connect

PCK Private Call Key

PCK-ID Private Call Key Identifier

PSK Pre-Shared Key

SPK Signalling Protection Key

SRTCP Secure Real-Time Transport Control Protocol

SRTP Secure Real-Time Transport Protocol

SSRC Synchronization Source

TBCP Talk Burst Control Protocol

TrK KMS Transport Key

UID User Identifier for MIKEY-SAKKE (referred to as the ‘Identifier’ in RFC 6509 [11])

XPK XML Protection Key