Harrison's Sandbox

In late 2025 IKEA started rolling out a series of Thread based / Matter compatible smart home devices.

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 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

How to get root on nontraditional Android devices by patching the adbd binary.

Reverse engineering a children’s smartwatch, and discovering some unexpected “features”.

Autonomous vehicles are becoming closer to reality, and the technologies developed to support them have already started hitting the market.

This post walks through the processes of building a passive IMSI catcher.

This is a map of amateur radio repeater stations in Norway.

A while back I decided to no longer use the router given to me by my ISP.

This post walks through setting up a CAN controller on the Raspberry Pi.