Note that from the blue computer to the VPN server and back, all transmissions are encrypted. From the VPN server out to the rest of the world, communications are NOT encrypted. The goal of the VPN server is not to make wireless transmissions end-to-end secure; the goal is to permit wireless and off-campus users to access resources on the UIUCnet network without revealing sensitive data such as login names and passwords to anyone close enough to "overhear" it. The VPN server carries the transmissions securely into the wired part of the UIUCnet network. From that point on, however, the wireless users' communications are subject to the same protections and vulnerabilities as any wired computer on the UIUCnet network. For more information, see Security and VPN.
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