Call Kurtis Investigates: Thieves Can Use Smartphones to Clone Your KeysI decide to test it out with my own house key. San Francisco based KeysDuplicated.com requires you to upload images from the front and back of the key. The cost is $6 for the first key which you can pay by credit card. Within three days, my key arrives. I test it out with my home, and it let me in with no problem.