All of this makes it practically impossible for another programmer to steal cookies that do not belong to them. Another big security factor is that with cookies there is no centralized database of information. Instead the information is on many computers each containing its own personal data. This means that for someone to steel your info, they must break into your computer, not some server who knows where and how protected. To get the information later the programmer simply ask for the cookie by name.
Cookies make it easy to save, identify, and protect user information on the web.
We hope this information helps you understand what cookies are really all about.