I am not entirely convinced. I am not convinced at all.
Cookies are small sets of information generated by users as they look at Web sites.
They are stored on your computer's hard drive, and sent to the Web server when you go from page to page. The server replies to the request and delivers the document. Your browser then interprets the document and formats it for your browser window. As more sophisticated Web-based services arose, the need for a secure method of exchanging user information was indentified. The solution was the development of cookies.