>You wifi cards constantly sends out “hey home network, are you there? Hey network of my mate, are you there?” for every network you where connected at one time, resulting in a pretty unique used AP list that leaks astonishing metadata like where you where on vacation in some scenarios (“trump hotel guest wifi”) and so on… More a threat to smartphones, but of course also applies to laptops.
IIRC this only applies if you have connected to "hidden" networks. Directed probes (ie. probes with SSIDs) are only really needed in those cases because the SSID isn't being broadcasted. For networks with SSIDs clients will send a probe without any APs, which causes all nearby APs to reply.
IIRC this only applies if you have connected to "hidden" networks. Directed probes (ie. probes with SSIDs) are only really needed in those cases because the SSID isn't being broadcasted. For networks with SSIDs clients will send a probe without any APs, which causes all nearby APs to reply.