Hi, I do not use hostapd myself but I suppose you can enable wpa2 encryption of your access point by modifying the wpa line of your hostapd.conf: wpa=01 # wpa2 only or wpa=11 # wpa and wpa2 take a look at: http://hostap.epitest.fi/gitweb/gitweb.cgi?p=hostap.git;a=blob_plain;f=hostapd/README