Please vet my startup/project idea — pdf3

Imagine you have a privacy-sensitive document that you would like to print but you don't have a printer at home/office and have to rely on a third party to print it for you. You have to give them the pdf by uploading it on their website emailing, etc. where you have little control over the file.

My idea here is to make a file that is made from the pdf but is blank on-screen and previews but when executed by the third party, will make the pre-defined number of copies in color or black and white.

The file cannot be opened/executed again. The print preview is blank/blurred out. I think it is time to improve how we print, hence starting pdf3.

1. Are they any other weak points?

2. Do you think there is a market for it given the growing concerns about data privacy?

3. Any ideas on how to build/implement it?

4. If this were to be a B2B, which business could be targeted?
   (For example, FedEx Print and Go or FedEx Office https://www.office.fedex.com/default/configurator/index/index?id=1534436209752-4-3)
   B2B as in TrustPilot shows social proof that a business is trustworthy.)