[TrunkCom] partial encryption and if so how is this possible?

[Jeff Kenyon]

Thanks, does anyone know if agencies do this kind of encryption
intentionally?





On Fri, 7 Jan 2005, Dewey wrote:

> Win a new Icom IC-756PROIII and help QSL/QTH.net
> Details at: http://mailman.qth.net/index.html
> _____________________________________________________________________
>
>
>
>
>
>
> Hi Jeff, and Happy New Year,
>
> I've seen this on our old VHF Saber's.  When in the clear mode, the
> portables will still receive and decrypt transmissions that were using the
> same encryption code.  In other words, if you and I had radios that had
> encryption codes to talk to each other, and you called me in secure mode,
> but my radio was set to open (unsecured) mode, I would still get your call.
> When I did, if I didn't pay any attention to the secure/open mode switch,
> and didn't look at the display to see the encrypted symbol, I would reply in
> open mode, and you would receive my signal.  To a scanner, your transmission
> would be encryption noise, and my transmission would be clear.
>
> Hope this helps, take care,
> Dewey
>
>
> -----Original Message-----
> From: trunkcom-bounces at mailman.qth.net
> [mailto:trunkcom-bounces at mailman.qth.net]On Behalf Of Jeff Kenyon
> Sent: Friday, January 07, 2005 09:36
> To: trunkcom at mailman.qth.net; scan-l at listserv.UARK.edu
> Subject: [TrunkCom] partial encryption and if so how is this possible?
>
> Good morning to all on the list.  I have noticed that when listening to
> conversations on Michigan.s digital 800 MHz system (MPSCS) there have been
> times where conversations are partially encrypted.  This morning I heard
> what sounded like some kind of road commission or something, but one side
> of the conversation was clear and the other was encrypted.  I.ve never
> known any system to do this, and the person who was clear wasn.t asking
> the person who was encrypted for a retransmit or anything.  As I said I
> only got to listen to this for a few minutes and couldn.t guess on what
> the agency was, but I found this to be strange.
>
> _______________________________________________
> TrunkCom mailing list
> mailto:TrunkCom at mailman.qth.net
> http://mailman.qth.net/mailman/listinfo/trunkcom
>
> Mailman: User Guide for List Subscribers
> http://mailman.qth.net/subscribers.htm
>