There’s a famous quote from a US Supreme Court Justice about hard-core pornography: I know it when I see it. We have definitions for the Internet: the set of hosts that can be reached using the lingua franca of TCP/IP. But what is the World Wide Web, commonly called the Web, and from a technical view, what is the Web public-key infrastructure?

Here’s my attempt:

The collection of entities — CA’s, those running web sites, and users who often use commodity browsers — that send and retrieve information over the Internet.

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