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This short video explains the risks of using a public wifi network and how you can protect yourself with a personal VPN like Private WiFi.
The links listed below provide further information:
Ask the Expert: What Exactly Is a VPN?
WEP, WPA, WPA2 and Home Security
Wi-Fi Alliance Strongly Recommends Personal VPNs When Using Wifi Hotspots
The Three Legs of Protection: Antivirus Software, Firewalls, and VPNs