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sticky-sandwich-47614

12/28/2021, 3:57 PM
How do you validate signatures in PDFs in Ubuntu? And How do you remove password protection on a particular PDF in Ubuntu?
c

careful-napkin-30353

12/28/2021, 4:07 PM
How do you remove password protection on a particular PDF in Ubuntu?
if i remember correctly unlocking the pdf and then saving a copy removes the password
f

flat-morning-91037

12/28/2021, 4:43 PM
You can remove password by opening PDF (and saving a copy) in Chrome as well. As for signature validation, you can take a look at Okular, it isn't strictly a GNOME app but should work.
f

fresh-teacher-33727

12/29/2021, 6:39 AM
As per my understanding, removing password might invalidate the digital signature but I could be wrong. To remove the password, you can either print the file after opening it or use tools like
pdftk
as explained at https://askubuntu.com/questions/828720/how-to-remove-the-password-from-a-pdf
I haven't had any successful attempts at validating digital signatures in Ubuntu so best luck there 😬
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