Information on unsecured WiFi access considerations.
Cyber Awareness Videos - Unsecured Wireless
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I always turn WiFi off on my devices when I leave my house.
Crackers can collect a list of the WiFi networks that your device connected to previously (including your home network) when WiFi is turned on.
I think something else that can be done to protect information on public networks is a VPN service. It basically creates an encrypted tunnel that all data travels through.