Re: random passwords

Hi,

Funny that you asked this :-).

I have a very elegant and secure solution to you problem which I want
to publish in LNCS or similar publication. Right now I'm working on a
couple of articles describing the solution that I'm going to submit to
one of the upcoming international crypto conferences (the one that have
submission deadline which I manage to catch). I have the program code
and test data results ready; I have collected all the necessary
material and almost done with security proof. I can't publicly disclose
solution here because if I do I would risk my submission to be refused,
but if your company is really interesting in such scheme, you can
contact me by e-mail - I'll be glad to provide consulting and implement
the whole scheme for your company.

-Valery.
http://www.harper.no/valery

mattdaddym@xxxxxxxxx wrote:
Hi all,

I have one of those situations where not only do I not know the answer,
but I am uncertain what the questions is, lol. I need to create an
application that for the following need:

My company frequently holds trainings in large conference rooms with
300 or more people. We are struggling to find an efficient way to
document who was in the training. Sign in sheets or laptops are too
cumbersome.

I'd like to do something like this. At the end of the training, cards
are handing out with a code. Later, the employee can go to a website
and enter the code and get credit for the training. All the codes
should be different, randomnly generated, and only good for one use.

I don't have any idea how I could generate these random codes off of a
key (maybe the course name/code) and then reverse the algorithm to
accept the code back to confirm the user attended the class.

This may be the wrong place to ask about it, but I'm hoping someone can
point me in the right direction. I have searched password generator,
license key generator, and cryptography to no avail.

Also, this does not need to be hack-proof. It only needs to stop the
casual goofball for getting credit for something he didn't do.

Thanks all!

.