You want to sign PDF's?

nospam@example.com (Ludwig Hertel) — Wed, 10 Jul 2024 08:16:00 +0200

Hi wouldn't it be nice to sign PDF without any external service?

Give JSignPDF a try JSignPdf - Just sign them! | JSignPdf (intoolswetrust.github.io)

GitHub - intoolswetrust/jsignpdf: PDF signing software written in Java. It supports visible signatures, timestamping, certificate verification and many other cool features

or...

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]

easy x509 handle

nospam@example.com (Ludwig Hertel) — Wed, 01 May 2024 14:11:00 +0200

If you used to GUI's and prefer the easy way of x509 ceertificate handeling give XCA a try

X - Certificate and Key management

or for latest stuff GitHub - chris2511/xca: X Certificate and Key management

using openssl can be sometimes anoying if you are not working daily with the commandline syntax of it

Ludwig Hertel's personal blog - Windows

You want to sign PDF's?

easy x509 handle

X - Certificate and Key management