Web Reference: Learn how to add and remove passwords to PDF files using PyPDF4 library, as well as using pyAesCrypt to encrypt and decrypt PDF files in Python Jul 15, 2025 · So, it's necessary to password protect our PDF files so that only authorized persons can have access to it. In this article, we are going to see how can we set a password to protect a PDF file. Apr 18, 2017 · Either use a library that supports AES for encryption or put the PDF in an encrypted container, for example an encrypted ZIP file. I would highly recommend the pyAesCrypt module. It is based on the Cryptography module which is written partly in C. The module is quite fast, especially in high spec computers.
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