I want to create a CAPTCHA solution for Lotus Domino web applications.

If you need more info on what CAPTCHA is then check out:

http://en.wikipedia.org/wiki/Captcha
http://www.captcha.net/

I haven't thought through all the details of this. I'm looking for you to design and develop the solution for me.

The CAPTCHA needs to be reusable across any form on a server. It would need to be included into:
Forms
Subforms
Agents which generate web forms through html.

We could possibly implement the validation via JavaScript in the client. We could also need some EASY way at the back-end of determining if the CAPTCHA was entered correctly.


Standard CAPTCHA's generate the letters and numbers on the fly. However that won't work here because I don't want the system to have to write any files to the server. We cannot assume that we will have access to do this. So the solution would seem to be that we store a graphic for each letter and number in a common database. (We would also store a list of words in the database) We could then display the graphics next to each other to form a word.

However I'm open to any solutions.

Let me know how you plan to accomplish this and how much it will cost.