Can session value be hacked?

Question

When I came out of a site without logging out, next time i browse that site I found I am logged in there? How that server restore the session value for my browser? Is there

Answer 1

The cookie usually is a session id that connects to a session database on the website's server; however, there are some cookies where most details are in local storage and are normally accessed through JavaScript or an identification key on the server. Most cookies can't be hacked, because you would need to decrypt the cookie by using a key which is normally on the server and then get remote access to the session database.