To position LTE as technology for critical communications such as public safety, security for Group Communication
(GC) needs to be considered. Group Communication function complements its sibling communication feature of
Proximity-based Services (ProSe).
The present document studies the security aspects of the Group Communication Service Enabler for LTE (GCSE_LTE)
and gives an evaluation of possible technical security solutions supporting such an Enabler. The present document looks
at security from system perspective and defines functional security requirements for all entities.
Stage 1 requirements for these services are defined in TS 22.468
Different possible Stage 2 solutions for GCSE have been studied in TR 23.768
provides the stage 2 description for the 3GPP system provided enablers to support GC services
using E-UTRAN in Rel-12.
Based on the work done in TS 22.468
, TR 23.768
, and TS 23.468
the objectives of the
present document are to identify the threats and deduce security requirements, develop GCSE_LTE security solutions,
and determine which solution(s) from the present document (Study/TR phase) should be converted into normative
specifications for Rel-12.