35c3 SDR Challenge

We are hosting a SDR/BTLE Challenge at 35c3.

Sign up on our scores page now and be among the first to collect some flags and score points!

You can see which challenges are online on the status page.

We are still in the builup and are adding challenges during congress, so check the scores server from time to time for updated info.

Bring your SDR equipment to Congress. Anything goes: RTL-SDR or rad1o badge - anything that works with GNURadio.

Visit this link and/or the SDR Challenge assembly during congress to participate.

We want to encourage you to play around with radio waves through the use of SDR. If you have never used an SDR before, it's a great chance to get started - it's easier than many people think. In our challenges you will have to decode certain messages in various modulations and read out the challenge flags. In the Bluetooth Low Energy challenges you will have to open various BTLE locks by either applying a known attack or sniffing codes from the air.

There will be a scoreboard to measure your success against other participants with prices for the top players. If this is your first time playing with SDR we will give you a small price if you make it onto the scoreboard at all.

You will need an SDR. For those who do not have an SDR we have RTL-SDR devices that you can borrow (for a small deposit) at our assembly.

You will need a Computer with some SDR software. A good starting point is to have GNURadio, gqrx and Inspectrum installed. Or any other software that you are already familiar with.

You will need some time. The easiest challenges only take a couple of minutes to solve, the hardest will take longer.

We also have some BTLE challenges - for one of these a simple device with BT4.0 interface will be enough. For others you'll need a BTLE sniffer like the one form Adafruit. We will also have a few of those for you available…

You can register already for the CTF on our scores page. There you will be able to get information on the challenges and submit the flags. You can also invite others to join your team and solve the challenges together.
To get the current status of the transmitting devices, visit the status page.

As we will set up the devices during the course of the day, the challenges will become available to solve.

If you're new to SDR, go to this Lecture on day 1: https://fahrplan.events.ccc.de/congress/2018/Fahrplan/events/9508.html

If you have any questions or need help with one of the challenges, stop by our assembly (precise location to follow)