Unique Download Link

Good afternoon, We need the assistance of a developer to update our website so that visitors can fill in a short form and receive via email a unique link to download some software. The way we imagined the process to work would be: 1) user enters some information on website page (name, company, email) 2) user receives via email a unique download link for the software Ideally the links would only be valid for a day or two, cannot be used more than once or twice, and it would not be possible to know the true location of the software (to bypass the information gathering stage and download directly). We would like be notified separately via email of new downloads/users. We would also like all the entered details to be saved to a database or simple text file (csv). If bidding, please provide example of your your or an explanation of how you would design this system. Thanks for your interest :-) All the best, Sam