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Don't most (mobile) devices broadcast all known SSIDs just in case a network is available and hidden? I don't really know a lot about the subject matter, but as

Don't most (mobile) devices broadcast all known SSIDs just in case a network is available and hidden? I don't really know a lot about the subject matter, but as I recall this does not apply to just iPhones. I also remember an installation at the Datenspuren in Dresden with a monitor showing all of these SSIDs it intercepted with people walking past and being astounded how the device knew their home network name^^

ycmbntrthrwaway 10y ago
Almost all Android devices do the same, they just send probe requests with all known networks. That is why you can automatically connect to "hidden" networks. Just run kismet or wireshark and see for yourself.
- BoorishBears 10y ago
  And it can be used to uniquely identify devices and track them with fairly standard hardware
  - epistasis 10y ago
    Doesn't a MAC address get broadcast anyway? Unless wifi devices are randomizing their MAC addresses that seems like a fairly trackable thing.
    - nitrogen 10y ago
      IIRC newer iOS devices do randomize the MAC address used for probes.