![]() ![]() ![]() Tools -> Digitally sign… -> (asks me for Firefox’s ‘master password’ in other words) -> draw a square for signature -> select digital certificate -> name of signed file. Try DocHub to edit, annotate, and approve documents from any device. In Okular: Settings -> Configure Backends -> radio tick “Custom:” and select the location where the Firefox data database with digital certificate is located (in my case it works /home/username/.mozilla/firefox/fault-esr). Easily Create Digital Signature PDF in Ubuntu and access all the essential document editing tools online. (( This step in case signing still doesn’t work. # flatpak run 3.) Setting up the certificate database (with personal certificate) # flatpak remote-add -if-not-exists flathub 2.) Install Okular It works for me if I install a newer Okular via Flatpak: 1.) Install flatpak I also tried building a container a little bit - unsuccessfully. A digital signatures is more secure and certifies that someone with a private signing key has seen the document and approved it. It’s simply an exact image of the signature of the signatory, laid over a PDF document. Otherwise, I followed the recommendation ( ) that the most comfortable way is via flatpack ( ). The differences between these two techniques are described below: An electronic signature is equivalent to a handwritten signature. Maybe it already works for you if you have a new enough Linux (version 21.01 of poppler). Core features include digital signature and certificates, identity authentication, advanced workflows, integrations and API. ![]() Therefore I will continue to use pyhanko. For PDF documents, a digital signature is the equivalent of the handwritten signature on paper documents, so the recipient of the signed document may be. jsignpdfAUR can digitally sign PDF files with X.509 certificates in GUI and CLI. I found something that works for now, but it’s a Flatpak container and containers are apparently not very safe. ![]()
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