Tyt uvf1 scrambler problem

[teufler]

Years ago I bought a descrambler that was wired into series with your scanner speaker. Then you had a simple dial that you adjusted to get reasonably clear voice. Most people don't have a device like that handy. A radio with no scramble circuit I don't think they can hear anything clear.

 

[Delta33]

Yep, I had a couple of those too. Ah the simple days are gone.

 

[jonwienke]

You can get that sort of functionality with SDR now.

 

[Delta33]

You can get that sort of functionality with SDR now.

. True, but not nearly as simple as it once was.

 

[MarkVee]

For a mobile, the Anytone 5888 has 12 codes, 10 fixed and two custom. They have allowed matching up with Kenwood Commerical gear with voice inversion. I have found most voice inversion schemes are not compatable with other brands. The custom settings allowed me to match up. Kenwood , on some radios does not have a fixed setting, you just key in a frequency to use. The Juentai uv8dr allows the 8 fixed settings so is reallly not compatable unless you change the Kenwood settings to match, rather than change the Juentai to match the Kenwood. The voice inversion is good enough to transmit health and welfare, traffic that normally a cell phone would be used. Causal eavesdroppers will have a hard time zeroing in on traffic. Its not as secure as digital encryption but its better than nothing.

Wasn't aware the Anytone had that custom offset option, thanks. The incompatibility between manufacturers voice scramblers (Puxing and Yaesu anyway) is what I've found as well.

IMO it is worse than nothing, because it offers an illusion of security without being at all secure. It can be defeated in real time by anyone with a bit of technical skill.

It is trivial to defeat, no debating that. The sound of voice inversion is easy to recognize and once found it's nothing more than turning a knob (HW) or adjusting a slider (SW) and you're listening to it live and in the clear. 10 seconds if you're ready and expecting it? Slightly longer if you chance across it unexpectedly maybe. Easy to defeat with freeware from a recorded wav file too.

I wouldn't rely on voice inversion as a means to secure any truly important information, but for infrequent use and just a quick exchange of information lasting less than 10-15 seconds with another party you've precoordinated it's use with, it's fairly secure unless someone happens to be recording it. Duplexed operation, in different bands, would offer a little better security against someone capturing both sides of the conversation too. Other than that it's pretty worthless, and used too frequently it's just inviting a curious listener to go to the trouble of defeating it.