Putting Digital Signature on PDF in Ubuntu 20.04
Adobe Acrobat DC on windows support this feature. While snap package adobe acrobat is partially functional on linux, as it logs incompatibility message.
So actually I am looking for signing my offer letter pdf for joining I want to do it on ubuntu 20.04. Is there any software (long term supported) for that?***
Requirement:
- I will be putting my name in the signature in text or image form.
- The whole thing will get digitally signed by some encryption algorithm.
Mostly what I am getting is merely signing and securing the document but not a visible signature. Any wayout?
Not recommended (options 1): use deb installation commercial Foxit https://www.foxit.com/pdf-editor/ or online solution.
Not recommended (options 2): long way to install w$ on VirtualBox and use the latest Abode Reader DC or try to use deb installation Adobe Reader 9.
Recommended (options 3): In Ubuntu install apt-get install xournal add annotate picture as sign and sign all document by yours pgp key.
Sign:
gpg --clearsign --output=sign_file.pdf file.pdf
Verify:
$ gpg --verify sign_file.pdf
gpg: Signature made czw, 3 lut 2022, 12:45:58 CET
gpg: using RSA key 14644CCD80A59C3A15E226568C199B37E09FA079
gpg: Good signature from "xxxxx" [ultimate]
gpg: aka "xxxxxx" [ultimate]
You can add this command to filemanager-actions
Credit: How do I digitally sign a PDF with a S/MIME certificate?
pdf xournal pgp signature