Extra login security

[Loget]

Hello,

I was wondering whether a vbulletin coder would be kind enough to create a mod which;

When you login with your vbulletin details it will ask you for a ''Master Password'' which you can set in the user control panel. The ''Master Password'' will be non-resettable. The users will have the ability to turn the ''Master Password'' on and off.

I'm sure a lot of users will like this mod :P

Thanks!