How turning mobile data off, doesn’t, in LTE and 5G.
As the number of Private Networks built on LTE and 5G grow, how will PLMN allocation be managed?
Using Wireshark to sniff communication between your computer and Smart Card / SIM Card
Sending commands/APDUs to a real life Smart Card.
A look at the Confidentiality Algorithms used in 3GPP Networks, MILENAGE, XOR & Comp128
A look at APDUs and Interacting with Cards
The basics of Smart Cards & their File System
Getting up close and personal with Smart Card / SIM Cards
I put together some laser cut case designs for the Osmocom SIMtrace, Quite happy with the results. If you want to cut your own, I’ve sent the DXF files to the mailing list, and will try and add to the project.
Acronyms and cryptography – a look at Subscriber Identifiers in 5G
What do Unlock SIMs sold online actually do and how do they do it?
Why the BaiCells PLMN changes?
Quick look at cheap “Magic SIM Cards”, what they do, how they do it, and the amazing graphics they use.
Lessons learned about setting up VoLTE / IMS Networks at small scale.
How to encode and decode MCC and MNC as PLMN Identifiers
Using osmo-sim-auth to query USIM/SIM cards authentication mechanism.
Exploring the how and why of Authentication in LTE & NR networks.
Adventures in getting USIMs to use on private LTE networks.
How Android OS autoprovisions APN settings and how to set your own for your unique MCC & MNC.
We’ve talked a bit in the past few posts about keys, K and all it’s derivatives, such as Kenc, Kint, etc. Each of these is derived from our single secret key K, known only to the HSS and the USIM. To minimise the load on the HSS, the HSS transfers some of the key management […]