VPNs and Public Key Infrastructure (O'Reilly) [LWN.net]

Scott Brumbaugh explains virtual private networks on O'Reilly. "The virtual private network (VPN) is increasingly becoming an invaluable part of every business network. With broadband available in more and more places, small- and medium-size businesses are taking advantage of VPN technology and leveraging the investment they've made in their internal private networks, expanding services available to customers, partners, and staff. This article focuses on VPN tunneling. Because it is also necessary to understand the basic principles of data encryption, this article will also summarize the set of technologies that form a Public Key Infrastructure (PKI). We will see how to ensure privacy in a virtual private network."

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