Categories
IMS / VoLTE Mobile Networks RFCs & Standards SDM SIM Cards Software

SQN Sync in IMS Auth

A look at how the SQN resync procedure is performed in the IMS Authentication flows

Categories
5G SA Mobile Networks SDM Security SIM Cards

5G Subscriber Identifiers – SUCI & SUPI

Acronyms and cryptography – a look at Subscriber Identifiers in 5G

Categories
EPC LTE SDM

Diameter Dispatches: S6a Authentication Information Request / Answer

This is part of a series of posts focusing on common Diameter request pairs, looking at what’s inside and what they do. The Authentication Information Request (AIR) and Authentication Information Answer (AIA) are one of the first steps in authenticating a subscriber, and a very common Diameter transaction. The Process The Authentication Information Request (AIR) […]

Categories
EPC EUTRAN GSM LTE Mobile Networks RFCs & Standards SDM Security SIM Cards

Querying Auth Credentials from USIM/SIM cards

Using osmo-sim-auth to query USIM/SIM cards authentication mechanism.

Categories
EPC EUTRAN LTE Mobile Networks RF SDM Security SIM Cards

HSS & USIM Authentication in LTE/NR (4G & 5G)

Exploring the how and why of Authentication in LTE & NR networks.

Categories
EPC EUTRAN IMS / VoLTE LTE Mobile Networks SDM Security SIM Cards

Roll your own USIMs for Private LTE Networks

Adventures in getting USIMs to use on private LTE networks.

Categories
EPC LTE Mobile Networks RF RFCs & Standards Security SIM Cards

LTE (4G) – Authenticating the Network

How LTE Subscriber authenticate the network

Categories
EPC LTE Mobile Networks RF RFCs & Standards SDM SIM Cards

LTE (4G) – Authenticating Subscribers

LTE/4G’s use of RAND and K to verify subscribers identity.

Categories
LTE Mobile Networks RF RFCs & Standards Security SIM Cards

LTE (4G) – USIM Basics

Contents of a USIM, fields & their meanings and basics of EUTRAN authentication.