Confidentiality in the Internet: a friend or an evil

Appeared last century, nowadays the Internet is used in all areas of human life.
Unfortunately, sometimes we disclose much more information about ourselves in the
web than ever before, and much information about us is gathered not only by
organizations where we study, work, get scholarship or salary but also by the largest
software manufacturing corporations such as Microsoft. That is why there is a tense
discussion about confidentiality in the Internet in the modern society