This blog post walks through the efforts of reverse engineering the Zaptec Pro, an electric vehicle charger found in many parking lots and apartment buildings around Norway.…

Many countries are in the process of rolling out digital COVID-19 certificates. In Europe, most of these appear to be in the form of a QR code. I recently received my own certificate, and was curious about the data it contained, as well as the supporting infrastructure around certificate verification.…

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…