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Sci.Electronics.Basics -> Satellite radio - radio validation
There are 3 messages in this thread.
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Author: Jack B. PollackDate: 10:56 20-04-08
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I'm curious, can someone provide a simple several paragraph, basic
explanation of how satellite radio authentication works? eg. If the radio is
only a receiver and I cancel my subscription how does the radio know that
the subscription has been canceled (do they send it a list of all valid
radios)?
Thanks
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Author: Bob MonsenDate: 12:53 20-04-08
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"Jack B. Pollack" <N@NE.nothing> wrote in message
news:480b5980$0$30157$4c368faf@roadrunner.com...
> I'm curious, can someone provide a simple several paragraph, basic
> explanation of how satellite radio authentication works? eg. If the radio
> is
> only a receiver and I cancel my subscription how does the radio know that
> the subscription has been canceled (do they send it a list of all valid
> radios)?
>
> Thanks
>
>
My guess:
They probably send out programming information occasionally to tell your
radio to ignore them... "number 102374 has not paid its bill, it should stop
listening, be a good boy". The radio probably then deletes some kind of
decryption key it has stored.
Here are seemingly better informed guesses from Wikipedia:
`Each receiver has an Electronic Serial Number (ESN) Radio ID to identify
it. When a unit is activated with a subscription, an authorization code is
sent in the digital stream telling the receiver to allow access to the
blocked channels. Most services have at least one "free to air" or "in
the
clear" (ITC) channel as a test. For example, Sirius uses channel 184, Sirius
Weather & Emergency.'
Regards,
Bob Monsen
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Author: Jack B. PollackDate: 13:37 20-04-08
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"Bob Monsen" <rcmonsen@gmail.com> wrote in message
news:vyKOj.2133$pS4.1086@newssvr13.news.prodigy.net...
> "Jack B. Pollack" <N@NE.nothing> wrote in message
> news:480b5980$0$30157$4c368faf@roadrunner.com...
> > I'm curious, can someone provide a simple several paragraph, basic
> > explanation of how satellite radio authentication works? eg. If the
radio
> > is
> > only a receiver and I cancel my subscription how does the radio know
that
> > the subscription has been canceled (do they send it a list of all valid
> > radios)?
> >
> > Thanks
> >
> >
>
>
> My guess:
>
> They probably send out programming information occasionally to tell your
> radio to ignore them... "number 102374 has not paid its bill, it should
stop
> listening, be a good boy". The radio probably then deletes some kind of
> decryption key it has stored.
>
> Here are seemingly better informed guesses from Wikipedia:
>
> `Each receiver has an Electronic Serial Number (ESN) Radio ID to identify
> it. When a unit is activated with a subscription, an authorization code is
> sent in the digital stream telling the receiver to allow access to the
> blocked channels. Most services have at least one "free to air" or
"in the
> clear" (ITC) channel as a test. For example, Sirius uses channel 184,
Sirius
> Weather & Emergency.'
>
> Regards,
> Bob Monsen
>
Thanks
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