What You’ll Need A HackRF, LimeSDR, BladeRF, or PlutoSDR. These SDRs can transmit. If using a HackRF, make sure you have a TCXO (Temperature Controlled Crystal Oscillator). A Linux VM or Host. Note: Both flags on this project can be found without using an SDR, but without an SDR with…
Note: activities in this section require a Windows host computer with a trusted platform module installed. What is a trusted platform module? A trusted platform module or TPM is a co-processor that can be a discrete device but is more commonly integrated into other devices like the CPU. The TPM…
The Two Line Elements or TLE format is the standard way to describe satellites in orbit above Earth. Understanding the TLE format allows users to make predictions about future or past satellite passes. The simplest way to think of a TLE is as a description of an orbiting object’s motion…
Decoding a BPSK Signal Binary phase shift keyring or BPSK is the simplest form of digital phase modulation. Depending on the phase of the signal, the hardware or software decodes a zero or one. In this exercise dervied from the DoD Hack-A-Sat challenge, Phasor, you will decode a BPSK signal…
About GNU Radio GNU Radio is one of the primary tools used for studying, decrypting, and generating radio communications. GNU Radio is both a Python library and graphical front end for generating python radio programs. Users create programs by dragging blocks onto a workspace and connecting block outputs into block…
APT stands for automatic picture transmission–a form of radio communication to send black and white images over an analog audio channel modulated in FM. Many weather satellites such as NOAA-15, NOAA-18, and NOAA-19 broadcast live images of Earth using the APT format. You can find out more about this type…
When I created this site, I wanted to add an animated background. Here’s how I did it. First, here’s the javascript in full. And to add the background to the site, add the following CSS code: Finally, this HTML. How does this work Much of this javascript sets up the…
At the time of writing, Raven 2 is the newest machine on Vulnhub. Here is a link to the machine. It is a medium difficulty CTF. It took about a bit of time to go from boot to root, but nothing felt impossible. Here are the steps I took in…
I generally try to avoid commercial software while running Linux. However, sometimes I just have to run VMWare. I particularly do not like how VMWare adds a bunch of unnecessary network interfaces at all times. Plus, its services are fairly resource intensive. So, I wrote a simple script to start…