A few years ago when the whole "people are tracking your phones using wifi probes!" story got popular I ran packet captures on an android and ios device and found that neither made directed probe requests (ie. the kind that contained SSIDs). The man page for wpa_supplicant (which is used for android) seems to confirm this:
scan_ssid
SSID scan technique; 0 (default) or 1. Technique 0 scans for the
SSID using a broadcast Probe Request frame while 1 uses a
directed Probe Request frame. Access points that cloak
themselves by not broadcasting their SSID require technique 1,
but beware that this scheme can cause scanning to take longer to
complete.
A few years ago when the whole "people are tracking your phones using wifi probes!" story got popular I ran packet captures on an android and ios device and found that neither made directed probe requests (ie. the kind that contained SSIDs). The man page for wpa_supplicant (which is used for android) seems to confirm this:
https://www.daemon-systems.org/man/wpa_supplicant.conf.5.htm...