The purpose of this final paper is to raise awareness about the threats lurking on the Internet that most users are not even aware of. Concepts such as cookies, type of cookies, privacy and cyber security, behaviour of the cookies and the risks of their use, as well as the history of the cookies and their original purpose are discussed in the first part of the paper. In addition to illustrating the concept of cyber security, it is also crucial to depict the trends – what are the most often targets of hackers attacks and what is the role of media in finding out the personal information. It is also important not to forget the consequences for such actions. In the second part of this paper some examples of the most notorious cyber-attacks are mentioned, as well as the connection between such threats and cookies and the way that cookies are threatening the privacy. The final part is about protection under the laws elected by the EU and other countries, but also showing how these laws are enforced.