Problem with WiFi connection -Android tells me it is not secured
This happens with me too, whenever I try to connect to my  Wi-Fi when there is some maintenance job going on by my ISP or when the router lights are on but my final connection has not taken place ( I don't know why but it connects only after 5 minutes after all router lights are on ).
So I would suggest that you need not worry any of the above problems might be there.