In this post, I’ll go over how to decrypt your own 2G GSM SMS messages by pulling encryption keys off your SIM card and processing the data with gr-gsm.

A practical look at 2G GSM security after three decades

This post walks through the processes of building a passive IMSI catcher. The purpose of this post is to be educational - to highlight the ease of which these devices can be built, and to practically show how privacy is already being compromised today.