I want to email users an encrypted file from a Django Backend Script (running through manage.py) on Ubuntu. How can I encrypt the data so that it is unreadable by 3rd parties who might intercept or even just read the email and will require a password string that I can supply to the end user via another method (not email.)
What encryption scheme and application for Django/Ubuntu can I use so that a doctor could easily decrypt the data from their PC/MAC?