PSK

PSK

Other →
Introduced in Rel-6 Also in: Services, Radio Access Network, Core Network

PSK is a digital modulation scheme where the phase of a carrier signal is varied to represent different data symbols, such as binary bits.

Category
Other
Introduced
Rel-6
Where
Security
Also touches
3 segments
Specifications
17 specs
PSK Description Purpose Detected Changes Specifications

Description

Phase-Shift Keying

Purpose & Motivation

Detected Changes Across Releases

from 3GPP Change Requests

Specific changes extracted from the „Change history“ tables of 3GPP specifications (1 CRs across 1 releases). Complements the general historical overview above with the evidence-based evolution of this function.

Rel-17 1 change

In Release 17, the PSK function was extended to support GBA-based shared secret authentication within TLS 1.3. This enhancement allows a derived Pre-Shared Key, which functions as the Traffic-Encrypting Key for a Crypto Session, to be used for establishing TLS-PSK tunnels. These tunnels are specifically applied to protect MSRP and BFCP media streams on terminations configured via procedures like "Reserve And Configure IMS resources" and "Configure BFCP Termination."

  • GBA-based shared secret with PSK authentication in TLS 1.3 TS 24.109CR0071

Defining Specifications

3GPP specifications that define or reference PSK, with the latest known release. Sourced from the 3GPP document catalog — see methodology.

SpecificationTitleRelease
TS 23.333 vj00 MRFC-MRFP Mp Interface Requirements Rel-19
TS 24.109 vj00 HTTP Digest AKA & GAA Stage 3 Rel-19
TR 26.976 vj00 AMR-WB Codec Characterization & Verification Rel-19
TS 29.116 vj00 REST-based protocol for xMB reference point Rel-19
TS 29.333 vj00 MRFC-MRFP Mp Interface Protocol Rel-19
TS 29.828 vc10 IMS Media Plane Security H.248 Profiles Study Rel-12
TS 33.122 vj20 Security Architecture for CAPIF Rel-19
TS 33.179 vdc0 MCPTT Security Architecture and Procedures Rel-13
TS 33.180 vk00 Security of Mission Critical (MC) Service Rel-20
TS 33.310 vj50 3GPP Authentication Framework for Network Nodes Rel-19
TS 33.401 vj10 EPS Security Architecture Rel-19
TR 33.876 vi01 Technical Report on Certificate Management Rel-18
TS 33.879 vd10 MCPTT Security Study Rel-13
TS 36.300 vj00 E-UTRAN Radio Interface Protocol Architecture Overview Rel-19
TS 36.331 vj00 LTE RRC Protocol Specification Rel-19
TR 45.903 vj00 SAIC Feasibility Study for GSM Networks Rel-19
TR 45.914 vj00 MUROS Feasibility Study for Voice Capacity Rel-19
Patrick Zandl

About the author: Patrick Zandl (b. 1974)

Telecommunications specialist, technology journalist (founder of the Mobil server), and developer who has been running since 2025 — the largest Czech-language resource on AI-assisted programming. Formerly Chief Wizard Architect at Prusa3D and head of development for Turris at CZ.NIC; currently a consultant and instructor on AI implementation in companies.

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