Connecting through a VPN connection is one way to secure your communications, and AlwaysVPN provides VPN services to encrypt traffic using virtual private networking technologies. Users install a special version of the OpenVPN client and you pay based on the amount of bandwidth you use, with the minimum charge being $8.50 for 5 GB. The client runs on Vista and Windows 7. There is a similar free service called Hotspot Shield, but it contains advertising.
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