« Disabling kdump to reclaim missing RAM on CentOS 8 Windows fails to format USB drive that previously contained an ISO image »

Encrypting and decrypting PDFs using QPDF

Saturday, March 14, 2020

If you have a password-protected PDF and want to generate a decrypted version, it’s very simple with QPDF:

$ qpdf --password=123 --decrypt input.pdf output.pdf

To avoid entering the password on the command line (perhaps you don’t want it saved in your shell history):

$ qpdf @- --decrypt input.pdf output.pdf

Then enter --password=123 and hit enter and ^D.

To encrypt a PDF, do this:

$ qpdf --encrypt userPw ownerPw 256 -- input.pdf output.pdf

Similarly, to avoid including the passwords in the command, do this:

$ qpdf --encrypt @- @- 256 -- input.pdf output.pdf

And then type the user password, hit enter, the owner password, enter, and ^D.

Tags: pdf | Posted at 22:04 | Comments (8)

Comments

KINCAIDE3 on Sunday, January 3, 2021 at 23:02

Thank you!!1

RobertBoara on Wednesday, May 15, 2024 at 16:58

In Etsy, Amazon, eBay, Shopify https://pint77.com Pinterest+SEO +II = high sales results

Josephnal on Wednesday, May 15, 2024 at 19:50

Поможем получить <a href=https://libertyfintravel.ru/armenia><b>гражданство Армении</b></a> "под ключ".

Договор, гарантии. Консультация бесплатная!

Свяжитесь с нами в telegram: <a href=https://t.me/LibFinTravel><b>@migrapractice</b></a>

RobertGunse on Wednesday, May 15, 2024 at 20:06

Hi, kam dashur të di çmimin tuaj

FobertArbip on Thursday, May 16, 2024 at 13:24

Доставка цветов и букетов <a href=https://fc99.ru/>Интернет-магазин цветов</a>

DanaTwime on Thursday, May 16, 2024 at 17:44

Slightly off topic :)

It so happened that my sister found an interesting man here, and recently got married ^_^
(Moderator, don't troll!!!)

Is there are handsome people here! ;) I'm Maria, 27 years old.
I work as a model, successfull - I hope you do too! Although, if you are very good in bed, then you are out of the queue!)))
By the way, there was no sex for a long time, it is very difficult to find a decent one...

And no! I am not a prostitute! I prefer harmonious, warm and reliable relationships. I cook deliciously and not only ;) I have a degree in marketing.

My photo:
<img src="https://i.ibb.co/zhMSQpj/5489819-2-3.jpg">

___
<i>Added</i>

The photo is broken, sorry(((
Check out my blog where you'll find lots of hot information about me:
https://af-credit.ru
Or write to me in telegram @Lolla_sm1_best ( start chat with your photo!!!)

RobertBoara on Thursday, May 16, 2024 at 20:48

In Etsy, Amazon, eBay, Shopify https://pint77.com Pinterest+SEO +II = high sales results

DmhskcBof on Friday, May 17, 2024 at 09:15

I have been excited to putting down some stakes on different sports matches going on at the moment. I thought it would be best to tell everyone that I have discovered what I think to be the most trustworthy website across America. If you happen to be interested in joining the excitement, don't forget to take a look at the site: <a href=https://purecasinos.org/new/>Shop now</a>

Add a comment

Name:
Email: (optional, not displayed to public)
URL: (do not fill this in — leave blank!)

Comment: