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| From | Oregonian Haruspex <bob_davis_retired@yahoo.com> |
|---|---|
| Newsgroups | comp.misc |
| Subject | Re: Cool Stuff for Amateur Radio - APRS |
| Date | 2014-02-08 15:10 -0800 |
| Organization | A noiseless patient Spider |
| Message-ID | <ld6dh6$n87$1@dont-email.me> (permalink) |
| References | (1 earlier) <ld3r8l$ile$1@dont-email.me> <ld3ss3$rrc$1@dont-email.me> <unibrow-EC107D.07525808022014@189-82-4-46.user.veloxzone.com.br> <177155748413542868.039277bob_davis_retired-yahoo.com@news.eternal-september.org> <ld5d6a$fv9$1@dont-email.me> |
On 2014-02-08 13:58:33 +0000, 2phar said: > On 2/8/2014 4:07 AM, Oregonian Haruspex wrote: >> >> It is possible for authorities to determine not only that you are listening >> to the radio, but also what frequency you are tuned in to. The Germans had >> this technology in WWII, but it was very local and obvious - large detector >> vans and trench-coated goons roaming the neighborhoods. By the time 'Nam >> rolled around, this technology had been placed aboard US airplanes which >> could detect emissions from local oscillators from many miles away. >> >> Some radios, such as basic crystal sets, that are completely passive, and >> direct conversion radios may be immune to detection but I wouldn't bet my >> life on it. Still, detection of radios would be a lot more work than >> automated Internet surveillance. >> >> Thanks for the reply. Your site is interesting. >> > > I suspect the local oscillator snooping might not be much good with > software defined radio. There may be similar artifacts, but wouldn't it > be far more complex? A direct sampling SDR would do rather well, I think. It all comes down to the threat model - are you existing in a city where there are tens or hundreds of thousands of other computers running around the clock? Out in the country? In the woods with a special operations team of insurgents? In the last case I would consider almost every communications device to be a giant beacon screaming "DRONE STRIKE ME."
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Cool Stuff for Amateur Radio - APRS Oregonian Haruspex <bob_davis_retired@yahoo.com> - 2014-02-07 15:26 -0800
Re: Cool Stuff for Amateur Radio - APRS 2phar <none@example.com> - 2014-02-07 18:46 -0500
Re: Cool Stuff for Amateur Radio - APRS Oregonian Haruspex <bob_davis_retired@yahoo.com> - 2014-02-07 16:13 -0800
Re: Cool Stuff for Amateur Radio - APRS Massive Unibrow <unibrow@gmail.com> - 2014-02-08 07:52 +0000
Re: Cool Stuff for Amateur Radio - APRS Oregonian Haruspex <bob_davis_retired@yahoo.com> - 2014-02-08 09:07 +0000
Re: Cool Stuff for Amateur Radio - APRS RS Wood <rsw@therandymon.com> - 2014-02-08 11:48 +0000
Re: Cool Stuff for Amateur Radio - APRS 2phar <none@example.com> - 2014-02-08 08:58 -0500
Re: Cool Stuff for Amateur Radio - APRS Oregonian Haruspex <bob_davis_retired@yahoo.com> - 2014-02-08 15:10 -0800
Re: Cool Stuff for Amateur Radio - APRS Vince Mulhollon <vincemulhollon@gmail.com> - 2014-02-10 05:41 -0800
Re: Cool Stuff for Amateur Radio - APRS "Dirk T. Verbeek" <dverbeek@xs4all.nl> - 2014-02-08 12:17 +0000
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