Antenna for encrypted scanner frequencies

Discuss commercial and home made antennas.
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aguilacinco2018
Posts: 1
Joined: Sun Aug 04, 2019 11:13 pm

Antenna for encrypted scanner frequencies

Post by aguilacinco2018 » Sun Aug 04, 2019 11:18 pm

Hello. I’m very new to all of this. However my hobby is listening to Fire/EMS/Police frequencies. Lately, I’m coming across a lot of encrypted frequencies. Is there a way to decode them? Or an antenna to enable us to listen? Thanks anyone who can answer. [email protected] is my email. In case someone wants to email a response. Thanks!

Username
Posts: 462
Joined: Sun Oct 09, 2016 7:27 am

Re: Antenna for encrypted scanner frequencies

Post by Username » Mon Aug 05, 2019 9:41 am

a way to decode them?
a) its illegal
b) there is a reason for why its encrypt

rtlsdrblog
Site Admin
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Joined: Mon Nov 19, 2012 11:54 pm

Re: Antenna for encrypted scanner frequencies

Post by rtlsdrblog » Mon Aug 05, 2019 10:53 am

If it's encrypted, then there is really no way to listen in.

Username
Posts: 462
Joined: Sun Oct 09, 2016 7:27 am

Re: Antenna for encrypted scanner frequencies

Post by Username » Mon Aug 05, 2019 11:46 am

Theoretical the must "just" be decrypt :D .

snn47
Posts: 166
Joined: Tue Dec 27, 2016 11:00 pm

Re: Antenna for encrypted scanner frequencies

Post by snn47 » Sat Aug 10, 2019 7:29 pm

For your understanding:

Antenna are passive they don't care about what signals are transmitted or received by the it.

It's Transmitter and Receiver that provide en-/decoding of signals.
a) its illegal
b) there is a reason for why its encrypt
c) depending on laws of the country you try to receive such signals you may be fined or at worst imprissoned.

TomLine
Posts: 7
Joined: Fri Aug 16, 2019 4:30 pm

Re: Antenna for encrypted scanner frequencies

Post by TomLine » Tue Aug 20, 2019 2:38 pm

Probably encoded, but not necessarily encrypted. Pipe the signal to DSDplus. Newest systems are P25, which has a big powerful control channel that's hot all the time, and then voice traffic will pop up on either side of that frequency when they talk station to car etc. If you pipe DMR or D-STAR ham encoded digital into DSDplus, it will decode it as well. If you use Unitrunker, it can show the control panel traffic pretty good. What is your locale ? You can lookup to see if you've got a trunking system to deal with.
In the US, it's legal to listen to any traffic, but illegal to disclose what you hear to other people. When police traffic is actually encrypted, the encoder will just blank it out or decode a bunch of noise.
If it's local signal, no special antenna will make much difference.

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