4 ms·

First reported 3 years ago with zero comments: https://news.ycombinator.com/item?id=21067915 https://news.ycombinator.com/item?id=21067915 Nice talk about the

First reported 3 years ago with zero comments: https://news.ycombinator.com/item?id=21067915 https://news.ycombinator.com/item?id=21067915 Nice talk about the project by the maker: https://media.ccc.de/v/mch2022-17-how-do-gps-galileo-really-work-how-the-galmon-eu-monitors-all-navigation-satellites https://media.ccc.de/v/mch2022-17-how-do-gps-galileo-really-... Link to html but ultimately a 49min video Very interesting, because it is not just the usual gps talk

sjaak 4y ago
Thanks for the talk, I enjoyed watching that
- ahubert 4y ago
  It was fun to do!
  - xrayarx 4y ago
    Hello there, thanks for your efforts! I really enjoy this happening! Could you please comment on this: https://twitter.com/erikkannike/status/1612729957851054080 https://twitter.com/erikkannike/status/1612729957851054080 How does he track the jamming? How do the russian jam? How could they ever jam up such a large swath? Does that even have a discernible effect on modern GPS receivers in smart phones? Surely it doesn’t effect military systems, they would anticipate jamming, right?
    - xrayarx 4y ago
      Never mind, I found https://gpsjam.org/ https://gpsjam.org/ and the sources are airplanes apparently, or more accurately the API of ADSBExchange
    - jjwiseman 4y ago
      There's a discussion about GPSJam, which is where he got that map, from a few months ago here: https://news.ycombinator.com/item?id=32245346 https://news.ycombinator.com/item?id=32245346 Sometimes the interference seen on those maps does affect phones, sometimes it doesn't. Coincidentally there's a huge region of GPS (at least) interference this week over the New Mexico area, from a military test. My guess is that people on the ground won't be affected, unless maybe they're very close to White Sands Missile Range between 18:30 and 22:30 GMT. See https://twitter.com/lemonodor/status/1611812892969664515 https://twitter.com/lemonodor/status/1611812892969664515 for more info.
dark-star 4y ago
Interesting talk. At the end he casually mentions so many things that he could also talk about, including that apparently the encryption on GLONASS military signals was already hacked, and that many parts of the mil-spec GPS are "securiy through obscurity"... Is this true? If so, where can I find more reading material about this? It was my understanding that the P(Y) code in GPS is encrypted using (basically) a OTP, and not based on obscurity at all? Doesn't GLONASS use a similar system?

sjaak 4y ago

Thanks for the talk, I enjoyed watching that

ahubert 4y ago
It was fun to do!
- xrayarx 4y ago
  Hello there, thanks for your efforts! I really enjoy this happening! Could you please comment on this: https://twitter.com/erikkannike/status/1612729957851054080 https://twitter.com/erikkannike/status/1612729957851054080 How does he track the jamming? How do the russian jam? How could they ever jam up such a large swath? Does that even have a discernible effect on modern GPS receivers in smart phones? Surely it doesn’t effect military systems, they would anticipate jamming, right?
  - xrayarx 4y ago
    Never mind, I found https://gpsjam.org/ https://gpsjam.org/ and the sources are airplanes apparently, or more accurately the API of ADSBExchange
  - jjwiseman 4y ago
    There's a discussion about GPSJam, which is where he got that map, from a few months ago here: https://news.ycombinator.com/item?id=32245346 https://news.ycombinator.com/item?id=32245346 Sometimes the interference seen on those maps does affect phones, sometimes it doesn't. Coincidentally there's a huge region of GPS (at least) interference this week over the New Mexico area, from a military test. My guess is that people on the ground won't be affected, unless maybe they're very close to White Sands Missile Range between 18:30 and 22:30 GMT. See https://twitter.com/lemonodor/status/1611812892969664515 https://twitter.com/lemonodor/status/1611812892969664515 for more info.

dark-star 4y ago

Interesting talk. At the end he casually mentions so many things that he could also talk about, including that apparently the encryption on GLONASS military signals was already hacked, and that many parts of the mil-spec GPS are "securiy through obscurity"... Is this true? If so, where can I find more reading material about this? It was my understanding that the P(Y) code in GPS is encrypted using (basically) a OTP, and not based on obscurity at all? Doesn't GLONASS use a similar system?