Log In by login,pass and memory word?

[xudder]

hello
i need modification for vb.
what i want:
my members must log in not only by typing login/pass - and also i want to do memory word check? can someone do it?
there can be I cannot well explain, because of my bad English.. sorry..
but i can give examples.. in online bank - there's using this system. like in:
_http://www.hsbc.co.uk/1/2/personal/internet-banking (type there eg number and u'll see this: Please enter the FIRST, SECOND and FOURTH digits of your security number)
_https://online-business.lloydstsb.co.uk/logon.ibc (here checking passing by type some letters from memory word)

and i need systems like this.. user with typing his Nick, password (in registration form) will type also memory word. and later in next log in - he will type 1/2/3/4/5/6/... letter from his word.. without authorization by this word he cannot log in...

can someon do this product?..
i think its hard work.. and only best coder can do this.. hey! best coders! where're you?

anyone?