Smart Card Readers for 5.25" Bay?

So I was watching the Tek, hearing about all kinds of stuff like the NSA doing this and that and so on, and I had an idea.  Basically I thought to myself "I should make the most secure computer in the world"; of course, I doubt that I personally can do that, but I could make something somewhat secure.  :P

 

So I went out to do a bit of research; the first thing I wanted to find was a way to login to a Linux computer without a password but while still maintaining security (as I believe passwords are a pretty insecure thing).  My idea for doing this, was a card reader (NFC, RFID, Magnetic Strip, or Smart Card; any one of those, but preferably something like a Smart Card which requires contact).  But it seems to be absolutely impossible to find a card reader which sits in the 5.25" drive bay, which is what I want to use if I do ever do this (which is unlikely, but still).

 

I was wondering if anyone knew of any places which sell smart card readers which sit in the 5.25" drive bay.  The closest thing I found was this: http://www.smartcardfocus.us/shop/ilp/id~358/SCR243/p/index.shtml but that's a PCMIA Card, so I'd need an adaptor.

 

I likely wont actually build this idea anytime soon, but I'd like to at least know where to find the appropriate card reader.  As well, even if I don't build this, it would still be nice to integrate something like that into my current desktop anyways.  :P

 

I know I could just use a USB Key to do all this, but a Smart Card is cooler.  :V  Basically I just want an excuse to buy Smart Cards and actually have a use for them.  :P  But also, I want to see what I can do with this.  I wanna do something where if you remove the Smart Card the computer automatically locks until you insert it again.

 

And I don't want something that connects to USB, I want something that's internal.  :p

Is it worth all the effort to maybe have some privacy?

It's more just a fun project.  I'm not really concerned with privacy, as the way I see it, everyone already has my data already (most likely).

 

But it would be nice to have a machine which I know is 100% private and secure.  I probably wont actually build such a machine though, at least not for awhile.  Mainly cuz I don't have the money to do so.  :P  But I want to pick out all the parts now, so I wanna start with the Smart Card reader.