Password Validation Website

Hi, We have a website, and we need to validate passwords to let the user go to the website. Exactly like here: [login to view URL] or [login to view URL] (no password, just type something) Try this password: 26177212484 And It will take you to: [login to view URL] or [login to view URL] So we will have the passwords that are valid for 60 days. We need to be able to insert passwords and delete them from determinate period. Be prepared to insert up to 4.000 passwords/day. So we need an admin that we can add and delete passwords easily from a period, or day. And even programmed to delete them in determinate number of days. Like a list that we can Copy and Paste separated by date. Or any solution that you have We have no back end or script done. And we are open to any cheap, easy and quick solution that you already have. We are going to do the layout of the page and give you a PSD file of it. Describe how you are going to do this project. And if you ever done something similar. Regards