Is He Really Who He Says He Is?
Another very common use for directories is authentication.
Suppose you wrote a Web application for betting on college basketball scores. This application is intended to be used (officially, of course) as a company team-building exercise. To ensure that each player is responsible for his or her bets (and is not making bets for someone else), you set up a small database of users and passwords. When the user directs a browser to the betting home page, the user is prompted to enter a user name and password.
At first, this system works just fine. But the idea becomes quite popular, and a colleague, Jim, decides to publish another Web application on his own Web server. This application takes bets on the number of irate ...
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