In Internet Explorer 8, what does the InPrivate Browsing feature primarily prevent?

InPrivate Browsing in Internet Explorer 8 is designed to enhance user privacy while surfing the web. Its primary function is to prevent any session data—such as browsing history, cookies, and temporary internet files—from being stored on the computer after a browsing session. This means that once InPrivate mode is closed, there is no record left of the websites visited or any data generated during that session. This feature is particularly important for users who wish to keep their online activities confidential, especially on shared or public computers.

This capability to not retain session data helps protect user privacy by reducing the likelihood that other users of the same computer can see what sites have been visited or any personal information that may have been entered during the browsing session. In contrast, the other options primarily address different aspects of web security and privacy, such as data encryption or unauthorized data input, which are not the primary focus of the InPrivate Browsing feature.