Need info about RFID technology

[microuser]

Hi!
Does anyone know a site where I can find clear info about every kind of RFID tags-readers?
I'm new to RFID and I only know UNIQUE 64 bit and Q5 tags.
I need to know security level of all tags and other info for make an authenticated access to an area.

Thanks to all, Francesco

[skimask]

I need to know security level of all tags and other info for make an authenticated access to an area.

http://www.rsa.com/rsalabs/node.asp?id=2120

How much money you got?

[microuser]

I haven't got anything... I'm gaining information on RFID before do an estimate for a full height turnstile with this kind of access. I want to be sure on products that I'm proposing.

Thanks for the link;)