Hi my Senior Tron Thank ur reply, may i ask you, if that AP ESSID is hidden than once a client connects to that AP using a valid ESSID, Than this is a GOOD chance to crack this hidden ESSID, Using what tools?how to do it? is it just using command: airodump-ng -w myfile -c 6 rausb0 , Than the hidden ESSID will apear on airodump-ng screen? Thank you very much.