InfoPath Dev

I know this is more of a SharePoint question than an Infopath question, but is there a way to add a group of permissions for everyone within a domain?

For instance, when I log in from outside my work's internet connection, I have to type DOMAINNAME\MyUserName and my password.

Could I give my form library permissions to let anyone that's an authenticated user log in with "DOMAINNAME\WhateverTheirNameIs" and their network passwords?

I don't want to enable anonymous access, just access to everyone within my company.

Thanks again.

 Nevermind! I believe I found a solution with the "All Authenticated Users" option.

 My only question remaining - This only gives access to people with the proper Domain prefix, correct? Are there any security issues with this function?