How do I use Wi-Fi Direct on the HP DeskJet Ink Advantage 3700, and is it secure?

Press the Wi-Fi Direct button to turn it on or off; if the light is blinking, a Wi-Fi Direct capable device is trying to connect — press the button to allow the connection. By default, Wi-Fi Direct is set to 'Automatic' mode without an administrator password, meaning anyone in wireless range can connect. HP recommends changing the Wi-Fi Direct Connection Method from 'Automatic' to 'Manual' and establishing an administrator password for higher security. (Page 2)