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s a user name and password. eBay also has a feature named My eBay that lets you review the auctions you39。 it39。s resources. This article, the first in a twopart series, explains the ABCs of Web security as seen through the eyes of and includes a handson tutorial demonstrating Windows authentication and ACL authorizations. A range of security measures and authentication methods are discussed, including basic authentication, digest authentication, and rolebased security. There39。s an old adage among developers that says building security into software is like paying taxes. You know it39。s a necessity. Security is a big deal in work applications because by nature those applications are available to (and vulnerable to misuse by and attacks from) a larger population of users. When the work to which an application is deployed is the Inter, security bees even more important because the list of potential users grows to about four billion. Web security is a broad and plicated subject. Much of the ongoing research in the field has to do with hardening Web servers against attacks. Microsoft174。ve bid on. Because My eBay pages are personalized for individual users and because they contain private information such as maximum bid prices, you must log in before viewing them. Intra sites that expose content to a controlled population of users—for example, a pany39。t be retrieved by unauthorized users—for example, preventing nonmanagers from viewing pages containing salary data and performance evaluations on the pany intra or preventing other people from viewing your My eBay pages. At a slightly deeper level, you might want to know who requested the page so you can personalize it for that ind