Fundamentals of Security in LTE

Subject: 4G LTE
Category: Core
Duration: 1 day

Course outline:

Introduction to EPS

● Evolution steps of the 3GPP systems, the goals for LTE/SAE
● Current status of the EPS standardization process
● IP in the Core Network
● Nodes and their roles: UE, eNB, SGW, MME, PGW, PCRF, HSS
● IP connectivity, user plane and control plane

IMS Protocols and procedures

● IMS architecture and nodes (S-CSCF, P-CSCF, I-CSCF, AS, HSS, MRFC, MRFP, etc)
● Control plane protocols: SIP and SDP
● User plane protocols: RTP and RTCP
● End-to-end IMS protocol stack
● UICC and ISIM and USIM (Subscriber modules)
● Public and private user identities
● IP in the EPS/IMS (IETF Dependence, dynamic UE address allocation)
● User profiles (IMS service profile) and filter criteria

Security in EPS

● Security architecture (key hierarchy) and keys’ derivation
● Integrity and encryption – SNOW 3G, AES
● Key distribution and mobility aspects
● EPS authentication (AAA procedures)
● User-to-Network security mechanisms

Security in IMS

● Network domain security mechanisms (IPsec in EPS and IMS with ESP and IKE)
● The IMS security architecture
● Diameter protocol, commands, applications and Attribute Value Pairs
● Diameter nodes and 3GPP extensions
● MME – HSS interface (S6a) and signaling with the use of Diameter
● S-CSCF – HSS interface (Cx) and signaling with the use of Diameter possibilities

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