A.11 User authentication and authorization requirements

A.6 Key stream re-use

A.5 Data communication between MCPTT network entities

A.7 Late entry to group communication

A.8 Private call confidentiality

A.1 Configuration & service access

A.4 Ambient listening

A.3 On-network operation

A.2 Group key management

9 Protection of floor control and sensitive application signalling