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Unfortunately, there's a lot to worry about. There are security risks that affect Web servers, the local area networks that host Web sites, and even innocent users of Web browsers. The risks are most severe from the Webmaster's perspective. The moment you install a Web server at your site, you've opened a window into your local network that the entire Internet can peer through. Most visitors are content to window shop, but a few will …

…of the user's tastes and habits. Finally, both end-users and Web administrators need to worry about the confidentiality of the data transmitted across the Web. The TCP/IP protocol was not designed with security in mind; hence it is vulnerable to network eavesdropping. When confidential documents are transmitted from the Web server to the browser, or when the end-user sends private information back to the server inside a fill-out form, someone may be listening in.