[Solved] Where do i find my network security key

You will have to go into the routers internal settings to see the wireless security key , the security key should have been written down when you created it.
You can use the default user name and password that came with your router to enter the routers internal settings and view or change or make a security key.
The default user name and password will be in the user manual or on the manufacturers web page for the brand of router that you have.