1. 3rd Generation Partnership Project(2013).Technical specification group services and system aspects; feasibility study for proximity services (prose) (Release 12). 3GPP TR22.803.
2. 3rd Generation Partnership Project(2018a).Technical specification group services and system aspects; security architecture and procedures for 5G system (Rel 15). 3GPP TS 33.501 V15.3.1 (December 2018).
3. 3rd Generation Partnership Project(2018b).Technical specification group services and systems aspects; security aspects; study on the support of 256‐bit algorithms for 5G (Rel 16). 3GPP TR 33.841 V16.0.0 (December 2018).
4. 3rd Generation Partnership Project(2018c).Technical specification group core network and terminals; non‐access‐stratum (NAS) protocol for 5G system (5GS); stage 3 (Rel 15). 3GPP TS 24.501 V15.2.0 (December 2018).
5. 3rd Generation Partnership Project(2018d).Technical specification group services and system aspects; 3GPP system architecture evolution (SAE); security architecture (Rel 15). 3GPP TS 33.401 V15.6.0 (December 2018).