Recent Posts

Hello Signal, Goodbye PGP

3 minute read

After years of maintaining my key I decided to drop PGP and move on to Signal. In this post I’ll explain why I made this decision.

cron is dead, long live launchd!

1 minute read

Now that I finally created my tarsnap backup script, how do I execute it regularly? Oh, I know: My Mac is just an Unix system, I’ll use cron!

The German income tax algorithm

3 minute read

Ever wondered how complicated the German tax system is? I wrote a Ruby implementation of the tax algorithm. In this post I describe what I learned along the ...

Analyse app traffic with mitmproxy

3 minute read

In the second post of my "reverse engineering mobile apps" series, I give an introduction on how to analyse the traffic of apps.