XPost: comp.mobile.android, alt.internet.wireless   
   From: usenet@arnowelzel.de   
      
   Alice J. schrieb am 2016-01-31 um 06:31:   
      
   > Mike Yetto wrote in message   
   > slrn20160130232159.855.twooffive@may.eternal-september.org:   
   >   
   >>> Except that your MAC gives you away.   
   >>   
   >> The BSSID is a unique label, not security, for the access point   
   >> of the network.   
   >   
   > Yes. You are correct.   
   > But my point was that the MAC *is* unique darnit.   
   > That's bad for privacy to have a unique number.   
      
   It's not very unique. Half of the address - the first 24 of 48 bits of   
   the MAC address - is the manufacturer identification (OUI) and the   
   remaining 24 bits are some serial number by the manufacturer. So it's   
   very likely that this address will exist more than once as many big   
   manufacturers produce more than 524288 network devices in total (which   
   is the maximum possible number of unique numbers using 24 bits).   
      
   And some addresses are reserved as well - as for example   
   ff-ff-ff-ff-ff-ff is the broadcast address and the addresses between   
   01-00-5e-00-00-00 and 01-00-5e-7f-ff-ff are reserved for multicast.   
      
   > Changing the SSID monthly is looking better and better.   
      
   And you really like to tell your devices the new SSID every month? I   
   have around 6 WiFi devices which I use here. It would just be awful if I   
   would have to reconfigure the network on all these devices every month.   
      
   I think it's easier just to use the "_nomap" extension for the SSID and   
   believe Google that they don't record these SSIDs. Otherwise take Google   
   to the court to forbid them the recording at all - good luck with that.   
      
      
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