iOS 7 beta 4 has just been released to registered iOS Developers. When I download it to my iPad 3, I'll see if Apple added new security features to prevent downloading by non-developers.
A warning to people who are not developers; If you try to download beta software without being a registered iOS developer you risk rendering your device unusable, don't try it!
A warning to people who are not developers; If you try to download beta software without being a registered iOS developer you risk rendering your device unusable, don't try it!