How many types of security is there in LTE core network ?

Question

In core network except radio part, how many types of encryption and security concepts has been implemented ?

Answer 1

If I understood your question correctly, LTE core network imposes security for lte signalling and IP sec for user plane. LTE signalling security is also known as NAS security, I know only two of them.One is AES and another one is SNOW 3G.

Please correct me if I am wrong.

Answer 2

Trying to understand the question in your perspective and answering accordingly.

1) Encryption/Ciphering type: Snow3g, AES, ZUC algorithm are used in lte.
As Vimal explained above these would be used for LTE signalling. As you said except radio part I haven't understand it clearly as LTE signalling is between UE<-->MME then offcourse radio will come into picture.

2) If you want to talk about security in core-network. IP Sec can be used. This will apply security between eNB<-->(MME | SGW | PGW). It protect the IP layer data.