This is because its standard for this to be multi-selected by the dispatcher (meaning two simultaneous transmissions) on their SG is just west of Western Counites in where they were looking at adding two more sites in neighboring counties. You can pull a fire page (analog FM with a 2 tone signaling) and match it against the transmission that goes out on the digital repeater.
In most rural areas running P25.getting clear audio and encrypted audio is easy. Its an interesting thought exercise and I could probably get to the point of parsing out the cipherd data blocks but I definitely can't write software. Every time they do you have to start over. Modern P25 systems are capable of rekeying over the air and they can rotate keys as often as they want. Now let's say you got lucky and somehow guessed the key in 5 min. By the time you can do the above you will have the equivalent of a grad degree in hardware or software engineering. Putting aside the tremendous time involved in actually running the permutations the above steps are complex. You will need to establish a crib or reference your software will use to determine when decryption is successful. Then you have to build software that will run decipher attempts against the test blocks. This step alone is not a trivial matter and beyond the skills of most hobbyists. Extracting the P25 frames and parsing them so you can look at just the encrypted blocks.
How exactly are you going to "run those keys against the audio". I'm in Central Tx as well.Īnother part to consider. If you want to record a transmission in some way to attempt to break I can provide the RF that's encrypted via AES, ADP, and DES.
Most people aren't into encryption because they don't know what it takes and don't want to spend the money on it. Majority of the pics I've seen are chicom radios. Much less what are you going to use to do it? It's not like you can just download some software that can start attacking a recording. I'm not sure you realize the resources it takes to brute force something like this. are all available and some offer encryption. I don't know what is being used by the other side. The question in this thread came about because of all the talk about comms and the riots. I now have room for all the antennas I want, so HF is my main focus. I need to get the FT 980 dusted off and checked out. I'm trying to get out of driving all together. Data (unit ID, TG ID, affiliations, pages, etc) is still in the clear and there is a lot of stuff you can gather from that info, especially if you know the foot print of each site.So data streams are in the clear? Sounds like a vulnerability. Another important thing to keep in mind about P25.only the voice is encrypted.
0 kommentar(er)
