Wireless network security is a serious issue. Wireless is not only a shared medium, but also a medium that is broadcast via radio waves which means that anyone with a wireless card could monitor your network traffic, including your passwords, account numbers, etc. Thus the data is inherently insecure.
In order to protect data sent over the wireless network, please ensure it is encrypted using SSL, SSH, or VPN.
For more information, visit the Office of Information Security website and OIT's Virtual Private Network (VPN) information.