[amsat-bb] Re: FLTSATCOM Hacked

Nate Duehr nate at natetech.com
Fri Apr 24 15:18:50 PDT 2009

On Fri, 24 Apr 2009 15:54:54 -0400, "RFI-EMI-GUY"
<Rhyolite at NETTALLY.COM> said:
> I think it is less important to worry about technology that can't be 
> hacked and more important to devise a scheme to locate  the source of an 
> interferer be it deliberate or accidental. With a bent pipe transponder 
> scheme, if there are two or more satellites having  overlapping 
> footprint, you can  monitor the downlink of each satellite and derive a  
> time of arrival  fix from each. Do some trig and get a fix on the 
> possible locations. I am sure this is exactly what the DOD is doing to 
> locate these pirates.

That leads logically to the next question -- what are you going to do
when you find them?  Do you expect International government support to
send resources out to the location and shut down the offending station? 
How much are you (and the rest of the world) willing to pay for this?

Better to lock the front door of the house, than to have to go wandering
the rooms, listening for the yahoos that came in the back door and are
eating your potato chips up in your kid's bedroom.  

As it becomes easier for the general public to get their hands on uplink
gear cheaply, and to operate it with virtually zero knowledge of how it
actually works -- the front-end of the birds must have a way to
discriminate between "authorized" and "unauthorized" users...

On-orbit infrastructure is too valuable to have it act as a "bent-pipe"
in an environment where the uplink/downlink gear is easy to acquire and

See previous note on possible uses of encryption technology along with
decentralized authentication data... and more importantly, how much we'd
be willing to pay for such authentication infrastructure... in our time
to set it up, and in real money to have it accessible via the Net to
all.  Not cheap, but then again -- real security never is.

Nate WY0X
  Nate Duehr
  nate at natetech.com

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