The Official Thread: Live audio feeds, scanners, and... wait for it.. ENCRYPTION!

[RayAir]

Another good option for businesses that just require on site radio coverage is the Motorola DTR 550 or 650. They can be easily set up for private talk groups.

Digital (VSELP) with frequency hopping.
Guards against whackers.

 

[balibago]

encryption=jerks

I'm really hoping this will be the year someone will post on the deep net an easy to use freeware utility that can crack some of this encryption. Oh and as far as that jerk who sold wal mart trbo radios. I believe their is a way to crack the simple encryption used on most of them that don't trunk. It would be cool to see someone find a way to jam these encrypted jerks.

 

[SCPD]

I'm really hoping this will be the year someone will post on the deep net an easy to use freeware utility that can crack some of this encryption. Oh and as far as that jerk who sold wal mart trbo radios. I believe their is a way to crack the simple encryption used on most of them that don't trunk. It would be cool to see someone find a way to jam these encrypted jerks.

Got a wifi password and security on your home network? Mind if I read your mail? Snoop on your phone calls? What's that you say? You've got all that locked down and encrypted? What a jerk!

 

[SirJ]

Got a wifi password and security on your home network? Mind if I read your mail? Snoop on your phone calls? What's that you say? You've got all that locked down and encrypted? What a jerk!

Hi5 good one!

 

[balibago]

traitor

Ah I see a group of traitors to our cause in the midst. My mail is not being broadcast over the air waves. Computer connections need to be secure to prevent theft which is always happening anyway is it not. WalMart and the local plumber need to just accept that radios aren't secure, big deal! As for the police high risk missions such as swat and drug busts must be secure. But we as citizens have some skin in the game and we should have access to all other comms. Or at least we should have the ability to decrypt if we are willing to put the time and effort into it. Having .01 percent of the population with the skills and savvy to do it decrypting these transmissions is good for freedom and good for America!

 

[lelanjlaborde]

Lets take a trade...you don’t encrypt our scanners we let you open encrypted phones...
NEW YORK (AP) -- Calling it an issue of victims' rights, the Manhattan district attorney urged Congress to pass legislation that would require tech companies to give law enforcement a way to access information on encrypted phones and other devices.

Cyrus Vance Jr. said that while the debate over encryption has centered on issues of privacy and national security, the implications go far beyond that. The Manhattan district attorney's office currently has 230 phones involved in cases that it has warrants to search, but can't access the information inside

 

[balibago]

Amen brother

That sheriff in our parish, Louis Ackal. Under indictmen,t big advocate of encryption. Mark Pope city marshall in Lafayette in trouble over refusing to hand over documents sentenced to 7 days home confinement , another encrypted agency. Encryption goes hand in hand with abuse of power.And as for private users as I said earlier encryption = jerks.

 

[Mars_P25]

Ah I see a group of traitors to our cause in the midst. My mail is not being broadcast over the air waves.

Well how in the heck is your WiFi working? You must have something else. Laser/optical communications? Sounds very cool.

Computer connections need to be secure to prevent theft which is always happening anyway is it not.

And NCIC/CPIC information -- which is private, should be broadcast in the clear? What about that 4 a.m. next-of-kin notification because your kid was killed overnight? Do you really want the media showing up at your place before the police do?

WalMart and the local plumber need to just accept that radios aren't secure, big deal!

Don't know what that has to do with anything, but OK.

As for the police high risk missions such as swat and drug busts must be secure.

Agreed. But what about when they're responding to a robbery in-progress, an active shooter or any other type of call where tactical advantage is lost, because some moron is streaming police communications'?

But we as citizens have some skin in the game and we should have access to all other comms. Or at least we should have the ability to decrypt if we are willing to put the time and effort into it.

You don't have the right to monitor private communications, but you can certainly try to do whatever you want, in the privacy of your home.

But an app will not be released anytime soon which "cracks" encryption, commonly used by law enforcement/government on P25 radio systems. There are five common algorithms which work on P25. Here they are, along with their key-lengths:

- ADP 40-bit (5-byte keys)
- DES-OFB/DES-XL 56-bit (8-byte keys)
- DVI-XL 64-bit (8-byte keys)
- DVP-XL 96-bit (12-byte keys)
- AES-256 256-bit (32-byte keys)

An algorithm's strength is not necessarily tied directly to its key-length. And for the purpose of the information I'm presenting below, I'm not taking into account how secure the hardware is, in which the algorithm is being implemented. (Side-channel attacks, key-cloning through flash ROM dumping, etc.) I'm assuming the elite radio hax0rs of Radio Reference are attempting to "crack" the key by attacking the RF interface of a system.

ADP has about 1.1 trillion possible key combinations. Yes, it could be brute-forced with a modern computer in a short period of time.

DES has about 72-quadrillion possible key variables. That's about 72,000,000,000,000,000 keys to go through, for people who don't understand numbers. DES is not a secure algorithm, but brute-forcing it still takes a considerable (to the average dude) amount of horse power. If you had an array of GPUs, it could be done in a matter of hours/days/weeks, depending on available GPU resources. Still, if the agency is using Over-the-Air-Rekeying (OTAR), you're not going to be listening for very long.

Not many agencies are using DVP-XL or DVI-XL. I did bring them up as they're still technically capable of being used to encode P25 communications. Both are weakened algorithms, intended for use in the private (business) or export sectors. They should not be used by law enforcement for modern systems.

AES-256 is the one you need to worry about. It cannot be brute-forced by current computing technology. A 256-bit key loaded into a P25 radio, looks like this:

19DDA161F9AC664D495EB20AE66327B6BFF140B9AD66953961DA2FA2D8B55A9C

To help you understand how strong AES-256 is:

https://blog.agilebits.com/2013/03/09/guess-why-were-moving-to-256-bit-aes-keys/

And for context...

How secure is AES against brute force attacks? | EE Times

...even with a supercomputer, it would take 1 billion billion years to crack the 128-bit AES key using brute force attack. This is more than the age of the universe (13.75 billion years). If one were to assume that a computing system existed that could recover a DES key in a second, it would still take that same machine approximately 149 trillion years to crack a 128-bit AES key...

And this is in reference to 128-bit keys. 256-bit keys have much more key-space available. I'm not sure about you, but I don't intend to live another 500,000,000,000,000 years. And even if I did, would the police still be using P25 radios? Would the information be relevant 500-trillion years from now?

Having .01 percent of the population with the skills and savvy to do it decrypting these transmissions is good for freedom and good for America!

Hopefully you understand what you're saying sounds kind of silly.

 

[balibago]

Freedom over this stupid safety crap

Let's start with that ADP! This is most of our misery.

 

[Mars_P25]

Let's start with that ADP! This is most of our misery.

It won't last long. They will soon upgrade to AES if their communications' are being illegally streamed on the Internet.

 

[kayn1n32008]

Let's start with that ADP! This is most of our misery.

Have at it. You are so eager to have an app that is free that defeats encryption, how about YOU make it. Just be sure you blabber your success here on Radio Reference...

 

[kayn1n32008]

Hopefully you understand what you're saying sounds kind of silly.

I doubt it. He is really hooked on a freeware app on the deep net...

 

[krokus]

Just for reference, the 72 bit RC5 encryption crack has been going for quite awhile. Here is info taken from the main page of the effort, www.distributed.net:

40 Billion RC5-72 blocks completed! (June 6, 2015)

Today we completed our 40 billionth RC5-72 block. This is a colossal effort, having taken over 12 years so far. Over 98,000 people have helped us along the way. Today's graphics cards can chew through the work in a way that we couldn't imagine when the project started in 2002. We still have much to do; we haven't even completed 4% of the key space. The good news is.. we could find the key tomorrow!

Sent via Tapatalk

 

[balibago]

Freedom over this stupid safety crap

I doubt it. He is really hooked on a freeware app on the deep net...

You must be one of those Florida country club Republicans! I bet "Jeb^ is a big encryption fan too. Either that or working for Motorola. I'll take freedom and lack of privacy over this "safety" crap anytime.

 

[kayn1n32008]

You must be one of those Florida country club Republicans! I bet "Jeb^ is a big encryption fan too. Either that or working for Motorola. I'll take freedom and lack of privacy over this "safety" crap anytime.

Nope on all counts... nice try though.

 

[SCPD]

'Murica!

Love me that freedumb.

 

[balibago]

So why don't you go take a spin on the p25 roundtable! You know such a thing exists. Perhaps you and all your glee club can spend the night discussing things like channel capacity and how much your agency needs the latest overpriced Motorola toy.

 

[kayn1n32008]

So why don't you go take a spin on the p25 roundtable! You know such a thing exists. Perhaps you and all your glee club can spend the night discussing things like channel capacity and how much your agency needs the latest overpriced Motorola toy.

You may want to stop wasting time and get working on that free ware ADP Decrypter app if you want to listen to ADP encrypted comms...

 

[SCPD]

So why don't you go take a spin on the p25 roundtable! You know such a thing exists. Perhaps you and all your glee club can spend the night discussing things like channel capacity and how much your agency needs the latest overpriced Motorola toy.

I see you're getting quite a bit of Vitamin E in your diet. That's why you're so upset.

 

[kayn1n32008]

I see you're getting quite a bit of Vitamin E in your diet. That's why you're so upset.

Probably an excess of vitamin S and M in the diet too...