Decode DMR With RTLSDR Dongle


As we are looking at getting our entry level HAM radio license we are still a big SWL fan. One thing we pride ourselves on is being able to listen – track – decode a number of activities. We know once we get licensed the mode that interest us the most is Digital over the radio. So DMR is on the list for sure along with WinLink, for now let’s focus on how to Decode DMR with the use of FREE software and a TRLSDR Dongle v3

Mat has put together some really good information and nice video. You should be using SDR Sharp Ok here is the info from M0DQW Below:

Here I go through setting up SDR # (Sharp) application from Airspy, to decode DMR Digital audio using DSD Plus command line application.
Using a specially made plugin, available free of charge, you can now control DSD Plus directly from SDR #. This tutorial already assumes that you have SDR # installed and working with your existing RTL SDR device.
You will also need to know any local frequencies to you that broadcast DMR or Digital audio, such as local Ham Radio repeaters.
Here’s what you are going to need:
RTLSDR Dongle: Buy from here to make sure you get the real thing https://www.rtl-sdr.com/buy-rtl-sdr-dvb-t-dongles/
Virtual Audio Cable https://www.vb-audio.com/Cable
DSD Plus (Latest Version) https://www.dsdplus.com/download-2 SDR # DSD Plus plugin http://www.rtl-sdr.ru/page/novyj-plag
DSD Information https://www.rtl-sdr.com/new-version-of-digital-speech-decoder-dsd-1-071-released/ 

ENCRYPTION ON THE TETRA PROTOCOL HAS BEEN BROKEN


TETRA (Terrestrial Trunked Radio) is a digital voice and text radio communications protocol often used by authorities and industry in European and many countries other than the USA. A major advantage to a digital communications protocol like TETRA is it’s ability to be secured via encryption.

Recently the security researchers at Midnight Blue in the Netherlands have discovered a collection of five vulnerabilities collectively called “TETRA:BURST” and most of the five vulnerabilities apply to almost every TETRA network in the world. These two most critical vulnerabilities allow TETRA to be easily decrypted or attacked by consumer hardware.

The first critical vulnerability is designated CVE-2022-24401 is described as decryption oracle attack.

The Air Interface Encryption (AIE) keystream generator relies on the network time, which is publicly broadcast in an unauthenticated manner. This allows for decryption oracle attacks.

The second vulnerability CVE-2022-24402 notes that a backdoor has been built into TEA1 encrypted TETRA, which allows for a very easy brute force decryption.

The TEA1 algorithm has a backdoor that reduces the original 80-bit key to a key size which is trivially brute-forceable on consumer hardware in minutes.

FULL ARTICLE CLICK HERE

 

Comments

Post a Comment

Popular posts from this blog

Join Our Zello Chat Group!

Image
Join Our Zell Chat Group: SWLQSL.Com is always looking at ways to make being part of our shortwave community fun and exciting. We now have a Cool Facebook group DRC – Digital Radio CLub on FB check it out.  Our next move was to give SWL’s a home to talk about shortwave and meet new people around the world.  NOTE: Some SWL’s Don’t Care About Getting A HAM License – This Is Why We Started This Channel Is So When You Want To Chat With Like Minded People You Can! No Monthly Fee’s or No Expensive Gear – No License Needed – FREE Call Sign Available!! We are into radio!! So that means HAM radio / CB / MW LW / Shortwave / AM FM you name it and we love chatting with people about Antenna’s – SKIP – DX and everything in between.  So we launched our own ZELLO channel that can be accessed: Via Zello FREE APP Via Zello phones and walkie talkies Zello is the leading push-to-talk voice messaging app for teams and businesses worldwide, turning iOS, Android, and Windows devices into walkie...
Read more

GET AN SWL CALL SIGN FREE:

Image
  GET AN SWL CALL SIGN FREE: Hi guys we will be showing you lots of projects that SWL’s can do and many of them you can actually interact with HAM operators.  This is because technology has finally caught up with radio. Now you can decode digital modes like CW the original and PSK31 – FT8 and JS8Call and others with some really simple hardware and software. We have apps today that you can open next to a radio picking up FT8 and without the internet the app will decode the FT8.  We are in some exciting times and our Projects will give you the ability to actually connect and give signal reports with HAM operators, send & receive QSL cards from them as well. You will also be able to receive awards for locking in countries and participating in SWL DX contests.  If you love radio like we do then do yourself a favor get a SWL Call Sign FREE just go to https://swarl.org/ Scroll down and apply for your FREE Call Sign .  If you don’t receive it in 2 weeks go t...
Read more

Low Earth Orbit Satellite Tracking

Image
  Ok Space junkies (LEO) Low Earth Orbit Satellites: We are always finding interesting projects for SWL’s and well anyone with interest to give it a go. This project will have you setting up and launching a tiny satellite ground station. LEO satellites are generally less costly to place as they require a great deal less rocket power to place. As compared to geosynchronous orbiting satellites at 36,000 km, LEO travel through a much denser atmosphere and thus experience far more aerodynamic drag. This means they require more power to travel at higher speeds and make corrections to maintain their lower orbits. Commonly used for communications, military reconnaissance, spying and other imaging applications. Most of the man-made objects orbiting earth are in LEO. Satellites made for communications benefit from the lower signal propagation delay to LEO. Check Ours Out – CLICK HERE If You Want To Try This Project Here Is What You Need: To Get Started You Will Need: •1 LORA board ESP32 ...
Read more