From: No <nonomos@mail.com>
   fyi
   [1]https://techcrunch.com/2017/06/02/who-catches-the-imsi-catchers-rese
   archers-demonstrate-stingray-detection-kit/
   >Who catches the IMSI catchers? Researchers demonstrate Stingray
   detection kit
   Posted Jun 2, 2017 by Devin Coldewey
   >Next Story
   Storyzy is a quote verifier that wants to skewer fake news
   Who catches the IMSI catchers? Researchers demonstrate Stingray
   detection kit
   >IMSI catchers, devices used to spoof cell towers and intercept
   communications, are one of the most resented open secrets of law
   enforcement. Strict non-disclosure agreements prevent them from being
   acknowledged as existing, let alone being used — but researchers think
   they’ve found a way to spot the shady signal-snatchers.
   A few years ago, maybe 2012 or 2013, I read an article which indicated
   that any cell phone, even one that had to active service, would be
   activated in the presence of an IMSI device.  I speculated, on
   Cypherpunks, that it would be easily to build an IMSI detector using a
   power source feeding such an inactive phone, with a current detector in
   place.  Ordinarily, that phone would dissipate a small current, which
   would be increased if an IMSI activated it.
   The article describes a substantially more sophisticated
   implementation, much like a website such as WIGLE.NET
   [2]https://wigle.net/       maps WiFi sites.  It presumably records the
   signal strength of the cell site that activates the target phone, and
   eventually draws a map of its computed location.
              Jim Bell
   [3]×
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References

   1. https://techcrunch.com/2017/06/02/who-catches-the-imsi-catchers-researchers-demonstrate-stingray-detection-kit/
   2. https://wigle.net/
   3. file:///var/lib/mailman/archives/private/cypherpunks/attachments/20171118/464af5f1/attachment-tmp.html