where is the security key?

"Security key" is a term that some manufacturers use for your wireless network password or passcode.

In rare circumstances some products might require the actual 64 digit hex code that is generated by the password. If your device is asking for a very long code of numbers and letters, post back to tell us what operating system you are using on your computer.

I've never had to use the hex code in 20+ years, but you never know.