Unity and PHP: Question about using Session ID between different scenes

This is a spin-off from this thread.

Tutorial: Unity and PHP login script - simple but useful by xandeck
http://forum.unity3d.com/threads/24721-Tutorial-Unity-and-PHP-login-script-simple-but-useful/page6

-- I made a small system using that tutorial wherein I use a script similar to the login script shown there. Then, once logged in, I get the session ID by getting my PHP script to output it to Unity.
-- Once I get the session ID I store it in a variable on a script on a Persistent Game Object(An Object that doesn't get destroyed between scenes)
-- Then when the new scene loads, I use this 'Persistent' variable to get the session ID and pass it as a form parameter if and when I need to communicate with php again.

I have gotten all this to work without any apparent problems so far.

My questions are
1. What are the security implications of this kind of process?
2. Am I doing this the hard way or is there a shortcut to moving session information between scenes?

 

Just to expand on my questions

I am aware of the sessions related security problems where it relates to the php side as mentioned here
http://phpsec.org/projects/guide/4.html

What I am looking for is any information about new problems that would develop when I use php in this manner with Unity

 

Hi
I'm also interested this. Did you experienced any success session attacks using this aproach ?