Community-Auth abnormal logout?

@skunkbad

thanks for your reply.

By the way while I'm trying to install the latest version.
I stumbled this part below,

Code:

14 Enable hooks and make sure there is an encryption key set in config/config.php. Community Auth provides a Key_creator controller for an easy way to set a valid encryption key. A 128 bit encryption key is recommended.

What do you mean by 128 bit encryption key?
Are you referring to 128 characters long encryption key?
How do I know it's 128 bit?
Kindly clarify, please.

thanks.