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You want to sign PDF's?

Posted by Ludwig Hertel on
LINUX

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)

JSignPdf download | SourceForge.net

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]