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What’s the best way to authenticate and track user authentication state from page to page? Some say session state, some say cookies?
Could I just use a session variable that has the ID of the user and upon authentication, instatiate a custom User class that has the User’s information. Then, on every page, verify the session variable is still active and access basic user data from the User object?
Any thoughts? Any good examples?
There’s no perfect way to do it. If you store it in a cookie you’ll take flak that cookies can be stolen. If you store it in the session you’ll take flak because sessions can be hijacked.
Personally, I tend to think a session is a little more reliable because the only thing stored on the client is a session key. The actual data remains on the server. It plays the cards a little closer to the chest, if you will. However, that’s just my preference, and a good hacker would be able to get past shoddy security regardless.
No matter what you do, don’t try to implement this yourself. You’ll get it wrong. Use the authentication system provided by your specific platform. You also need to make sure you have adequate security precautions protecting the authentication token.