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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. Dimitri Bouniol‏ @dimitribouniol 8 Aug 2017

      Dimitri Bouniol Retweeted 若旦那

      Some Chinese USB adapters have a hidden SIM that will send a text message with GPS coordinates to track an unknowing victim…https://twitter.com/wk_tyn/status/894789440584929281 …

      Dimitri Bouniol added,

      若旦那 @wakapippi
      中国のUSB充電アダプター型盗聴器が先進的すぎる。 充電器の上のふたを開けると、なんとSIMスロットがある。 SIMカードを挿入した状態で、このSIMカードの電話番号宛にSMSを送ると、コールバックし、これに出ると盗聴できる仕様。 もちろんGPS機能付きである。 pic.twitter.com/aMEF8sBdiL
      42 replies 1,358 retweets 1,093 likes
    2. eduo‏ @eduo 9 Aug 2017
      Replying to @dimitribouniol

      Wish it was only chargers: http://www.ebay.es/itm/GSM-SIM-Espia-Oculto-audio-voz-Escucha-bug-usb-2-0A-a-USB-Cargador-Datos-Cable-/322620757483?hash=item4b1db215eb:g:AbkAAOSwzT5ZecLv … - That's a USB Cable with SIM and GPS

      1 reply 5 retweets 9 likes
    3. Rich Felker‏ @RichFelker 9 Aug 2017
      Replying to @eduo @dimitribouniol

      Unlikely gps at that price, but maybe? Likely just cell tower based location.

      1 reply 0 retweets 0 likes
    4. eduo‏ @eduo 9 Aug 2017
      Replying to @RichFelker @dimitribouniol

      GPS chips cost cents. Before I shared news from 2007 where GPS chips had a price of $5.

      1 reply 0 retweets 0 likes
    5. Rich Felker‏ @RichFelker 9 Aug 2017
      Replying to @eduo @dimitribouniol

      Ones that actually work?

      1 reply 0 retweets 0 likes
    6. eduo‏ @eduo 9 Aug 2017
      Replying to @RichFelker @dimitribouniol

      What does this mean? These don't work?

      1 reply 0 retweets 0 likes
    7. Rich Felker‏ @RichFelker 9 Aug 2017
      Replying to @eduo @dimitribouniol

      Not sure. But getting a gps fix with no assist, tiny antenna, and not much computing power doesn't sound plausible.

      1 reply 0 retweets 0 likes
    8. Rich Felker‏ @RichFelker 9 Aug 2017
      Replying to @RichFelker @eduo @dimitribouniol

      I never got a working gps fix with cheap Chinese Android phones even. Only high end ones.

      1 reply 0 retweets 0 likes
    9. eduo‏ @eduo 9 Aug 2017
      Replying to @RichFelker @dimitribouniol

      This is unrelated to the chips and has more to do with bad design (the biggest factor in GPS). Computing power needed is trivial as well.

      1 reply 0 retweets 0 likes
      Rich Felker‏ @RichFelker 9 Aug 2017
      Replying to @eduo @dimitribouniol

      Now I'm curious how cheap GPS receivers work, since I'm only (somewhat) familiar with the workings of high-precision stuff.

      11:27 AM - 9 Aug 2017
      3 replies 0 retweets 0 likes
        1. New conversation
        2. eduo‏ @eduo 9 Aug 2017
          Replying to @RichFelker @dimitribouniol

          Especially simple for devices that won't be moving about a lot (like a plug charger) that compensate immediate inaccuracy over hours.

          1 reply 0 retweets 0 likes
        3. Rich Felker‏ @RichFelker 9 Aug 2017
          Replying to @eduo @dimitribouniol

          A tracking device that only works when someone leaves it plugged in several hours seems like it would have limited usefulness...

          2 replies 0 retweets 0 likes
        4. eduo‏ @eduo 9 Aug 2017
          Replying to @RichFelker @dimitribouniol

          You're talking about it as if we were not seeing twenty variants of it for sale. As if it was hypothetical :) It's right there.

          1 reply 0 retweets 0 likes
        5. Rich Felker‏ @RichFelker 9 Aug 2017
          Replying to @eduo @dimitribouniol

          I'm skeptical that they work as advertised, especially the cheap ones.

          2 replies 0 retweets 0 likes
        6. Rich Felker‏ @RichFelker 9 Aug 2017
          Replying to @RichFelker @eduo @dimitribouniol

          Businesses that market to stalkers are not known for ethical advertising.

          2 replies 0 retweets 0 likes
        7. eduo‏ @eduo 9 Aug 2017
          Replying to @RichFelker @dimitribouniol

          It's advertising what the basic functionality for any GPS plugged into a wall indoors at least 1 hr while would've (*any*, as it's basic)

          1 reply 0 retweets 0 likes
        8. Rich Felker‏ @RichFelker 9 Aug 2017
          Replying to @eduo @dimitribouniol

          Average person's conception is that GPS gets a fix in <5sec like their phone does. Not after hours of waiting.

          1 reply 0 retweets 0 likes
        9. eduo‏ @eduo 9 Aug 2017
          Replying to @RichFelker @dimitribouniol

          Average person's conception of GPS is irrelevant for a tracking device planted on a wall charger, though.

          1 reply 0 retweets 0 likes
        10. 3 more replies
        1. New conversation
        2. eduo‏ @eduo 9 Aug 2017
          Replying to @RichFelker @dimitribouniol

          GPS receivers are very simple and not "high-precision". It's very simple math. Inaccuracy was artificially introduced.

          1 reply 0 retweets 0 likes
        3. Rich Felker‏ @RichFelker 9 Aug 2017
          Replying to @eduo @dimitribouniol

          We're clearly not on the same page here.

          1 reply 0 retweets 0 likes
        4. Rich Felker‏ @RichFelker 9 Aug 2017
          Replying to @RichFelker @eduo @dimitribouniol

          I'm not talking about artificial inaccuracy but difficulties like very low SNR, need for many correlators for reasonably quick fix, etc.

          0 replies 0 retweets 0 likes
        5. End of conversation
        1. eduo‏ @eduo 9 Aug 2017
          Replying to @RichFelker @dimitribouniol

          After these inaccuracies were removed the only thing blocking GPS receivers is antenna design. Miniaturized and commoditized long ago.

          0 replies 0 retweets 0 likes
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