how to pass user login info to a script in a secure way?

[jonasredant]

Hi,

I'm adding a simple poker game to my manialink (for Trackmania United Forever)
using PHP 5.2. This requires user login information to be passed to a PHP-script.

I can use the "AddPlayerID" attribute to pass the information in a link.
However this isn't a secure way to identify a user, because the user can
easily manipulate the link in the ingame browser. Is there a way to
pass the user login information in a secure way?

Greetings,

Jonas