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RichFelker's profile
Rich Felker
Rich Felker
Rich Felker
@RichFelker

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Rich Felker

@RichFelker

Yeah, I do @musllibc, FOSS & infosec stuff. But now is not the time for a mostly-/only-tech Twitter feed.

musl-libc.org
Joined March 2014

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    1. whitequark‏ @whitequark Apr 23

      whitequark Retweeted D̒͂̕ᵈăᵃn̕ᶰ Ť̾̾̓͐͒͠ᵗe͗̑́̋̂́͡ᵉn̅ᶰtᵗl̀̓͘ᶫe̓̒̂̚ᵉrʳ

      it's a high-speed DAC, *obviously* it emits radio waves and "faking a cell tower with a VGA adapter" is scaremongering; you can't receive any data so no handset can associate with it. at worst, you could jam a cell tower (FCC will come and kick your ass)https://twitter.com/Viss/status/988503433924624384 …

      whitequark added,

      D̒͂̕ᵈăᵃn̕ᶰ Ť̾̾̓͐͒͠ᵗe͗̑́̋̂́͡ᵉn̅ᶰtᵗl̀̓͘ᶫe̓̒̂̚ᵉrʳVerified account @Viss
      wh .... what. usb to vga adapters squirt radio waves? and you can use them to fake a cell tower? .. i need to sit down. https://twitter.com/geeknik/status/988499664315076608 …
      6 replies 10 retweets 54 likes
      Show this thread
    2. whitequark‏ @whitequark Apr 23

      you have to actively prevent digital circuits from emitting radio waves. that's what the FCC part 15 subpart B is talking about. "unintentional radiators".

      1 reply 3 retweets 14 likes
      Show this thread
    3. whitequark‏ @whitequark Apr 23

      now spoofing GPS, yes, that is pretty serious. FCC will come and kick your ass too, but meanwhile you're going to seriously affect a lot of infrastructure nearby. this is a growing threat, mostly represented by truck drivers trying to work around fleet surveillance

      1 reply 2 retweets 27 likes
      Show this thread
      Rich Felker‏ @RichFelker Apr 23
      Replying to @whitequark

      Not sure, but I think it's possible to make a highly spoof-resistant (not jam-resistant of course) GPS receiver using multiple antennas.

      3:01 PM - 23 Apr 2018
      1 reply 0 retweets 0 likes
        1. New conversation
        2. whitequark‏ @whitequark Apr 23
          Replying to @RichFelker

          you can make a spoof-resistant GPS receiver, and you can even make a jam-resistant GPS receiver (within reason), but the issue is that a) most vendors don't bother doing basic sanity checks b) it's impossible to tell just by looking at the device c) shitty chipsets are everywhere

          2 replies 0 retweets 3 likes
        3. whitequark‏ @whitequark Apr 23
          Replying to @whitequark @RichFelker

          read https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/676675/satellite-derived-time-and-position-blackett-review.pdf … for details

          0 replies 0 retweets 0 likes
        4. End of conversation

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