title: Asp.net Sessionid cookie: how it work?
body: <p>i've already read microsoft guide about session, but i still don't understand a thing:
  when i call session["somesession"] this method read the session cookie each time?</p>
  
  <p>i've seen a random sessionid 
  KOJEAKBAALANILPHAGONBEIC
  this was taken from <a href="http://www.w3schools.com/" rel="nofollow">http://www.w3schools.com/</a></p>
  
  <p>My question is:  how can this little string be secure?
  it is easy to guess it expecially if the site has many active session</p>