Computing desk
< June 17	<< May \| June \| Jul >>	June 19 >

Welcome to the Wikipedia Computing Reference Desk Archives
The page you are currently viewing is a transcluded archive page. While you can leave answers for any questions shown below, please ask new questions on one of the current reference desk pages.

June 18[edit]

pdf[edit]

on linux, how do I bypass password of locked pdf? --Thegooduser Life Begins With a Smile :) 🍁 01:25, 18 June 2020 (UTC)[reply]

Have you ever tried Googling your questions? [1] Elizium23 (talk) 01:28, 18 June 2020 (UTC)[reply]

Elizium23 Yes, reason I ask here is that I don't have the best cpu, and for some it requires open in terminal option, which I don't have, If I knew the answer then I would not ask it here. Thanks :) --Thegooduser Life Begins With a Smile :) 🍁 00:13, 19 June 2020 (UTC)[reply]

PDF § Security and signatures: Assuming it's a "user password", your only option is brute forcing. The link Elizium23 provided discusses a utility that does this. The PDF is encrypted, and the password is the encryption key. If whoever set the password used a poor-quality password, this may not take very long (a dictionary attack will try commonly-used passwords like "passw0rd1"), but if they used a good one you're probably out of luck, as it would take many centuries for brute-forcing to finally succeed (barring various unforeseen future events). There is no "secret trick" where if you ask your computer the right way it will reveal the file to you. Your computer doesn't have the plaintext. Just saying this because I kind of got the sense from how you worded your question that you might have the impression there's some "secret" for "bypassing" the password that only "hackers" know. --47.146.63.87 (talk) 02:23, 19 June 2020 (UTC)[reply]

Here it list a few possibilities to add the terminal option in some systems: [[2]] 2003:F5:6F06:8700:C5DA:CCAD:6F6C:ABCA (talk) 19:07, 20 June 2020 (UTC) Marco PB[reply]

~~There is a website called small pdf, how do they crack the passwords there? --Thegooduser Life Begins With a Smile :) 🍁 23:52, 20 June 2020 (UTC)~~[reply]