The ColdStorage sample contains two XML Web services: an Advertising Service and the ColdStorage Service. The Advertising Service provides a set of bitmaps and hyperlinks that are used by our Advertising Window Forms Control. The ColdStorage Service stores a customer's files and allows the customer to maintain them in a folder hierarchy. Both of these services have an authentication requirement. To provide targeted advertising, we wanted customers to be able to specify which ads most interested them. That strategy meant that we would need to verify customer identity. For the ColdStorage Service, security was the main issue. As a file storage system, we had to guarantee that customers had exclusive access to their files.
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