Wordpress

[Miku]

I saw a few plugins that I can make my site members only, but I is there any plugins that can control the register form. Add a section that need to enter a password in order to complete the registration. Need help.
I'm also using wp-touch pro. Is there a way to force mobile user to login before browning the content?

[TalishHF]

I saw one on hackforums that someone posted where you needed a pin to sign up to the forum.