1. 3gpp-tr, 33.821, 3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; Rationale and track of security decisions in Long Term Evolved (LTE) RAN / 3GPP System Architecture Evolution (SAE)(2009–06). Release 9. 3GPP Organizational Partners.
2. 3gpp-ts, 22.278, Universal Mobile Telecommunications System (UMTS);LTE; Service requirements for the Evolved Packet System (EPS), (2012–09). Release 11. 3GPP Organizational Partners.
3. 3gpp-t, 33.401, 3rd Generation Partnership Project ;Technical Specification Group Services and System Aspects;3GPP System Architecture Evolution (SAE):Security architecture, (2008–10)Release 8.1.1. 3GPP Organizational Partners.
4. 3gpp-ts, 33.401, Digital cellular telecommunications system (Phase 2+);Universal Mobile Telecommunications System (UMTS); LTE; 3GPP System Architecture Evolution (SAE);Security architecture (2013–07). Release 11. 3GPP Organizational Partners.
5. Ensured confidentiality authentication and key agreement protocol for EPS;Abdo,2012