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Much easier just to log whatever SSIDs the phones are broadcasting. My phone currently knows about 20 wifi networks from which I can work out where I live, wher
by lotsofcows 11y ago
Much easier just to log whatever SSIDs the phones are broadcasting. My phone currently knows about 20 wifi networks from which I can work out where I live, where I work and where I've been on holiday.
- Johnny_Brahms 11y agoFor those that are surprised that your phone is such a snitch: That can be shut off, even on app-level. There is Wifi privacy police for android, and probably something similar for ios. I actually did just that at work. First of all I had a raspberry pi that got all the device names connected to my company wifi (the guy responsible for the network is actually just the janitor, so the wifi is basically the wild west). After a bit of puzzling I knew the MAC-addresses 90% of my closest colleague’s phones. From there it was easy to do the rest. Just set up your own wifi network and monitor SSID broadcasts. This worked fine until iphones started randomizing their mac addresses, but since I know when a certain device appears on our work wifi, I could probably just compare when a scan was made to when a certain device was connected. I just can't be bothered. The system is still up and running, and now even has a nice web interface that I can access from home. I'll eventually release it as FLOSS, but I'll have to clean the code quite badly. It only requires guile and nmap, but can probably be ported to something fancier.
- cm2187 11y agoBut can the police do anything with this SSID?
- lotsofcows 11y agoIs it presentable in court? Depends on your jurisdiction. Can they use it as I can - to translate SSIDs into locations? https://wigle.net/ https://wigle.net/