Here's a write-up of the challenges of the Norwegian Police Security Service's capture the flag advent calendar for 2020.

Here's a write-up showing how to solve the challenges of the Norwegian Police Security Service's Easter CTF.

Here's a write-up showing how to solve the challenges of the Norwegian Police Security Service's CTF advent calendar.

Learn how to reverse engineer Android apps, alter them, and put them back together. No root needed.

The Norwegian Police Security Service had a job posting with a "digital riddle" to find the right candidates for a job. Here's (hopefully) the solution.

Looking for an easy way to find out when the garbage was being picked up ended up in discovering a data leak affecting half a million people.