Create encrypted PDF invoices or quotes, receipts

It is a fantastic software. recent development have been even more cool.
I have one query relating to pdf files created by software.
I would like to encrypt (password protect) so that the pdf file sent by directly email or locally created by Manager are protected against copy, or edit. I would like my clients to just print only.
So, Can we add a facility to protect pdf files created by Manager.
Thank you/

I’m removing this topic from ideas category on the basis that this feature request is related to internal PDF generator which is now obsolete.

If you want to produce password-protected PDF documents, you can install custom print driver such as CutePDF which has this feature.