This is the third in a series of blog posts debunking some common misunderstandings about online privacy. The images used in these posts have been adapted from a tutorial given by Gerald Friedland at ACM Multimedia in Nara, Japan in October.

Most sites are viewable by the public, not just the people you are intending to communicate with. Even non-public sites may be sharing some information with, for example, their advertisers. Never assume that information you provide on a Web page is private.