I would like to know, if it is possible to digitally invisible sign a pdf created by latex automatically after
- each time I create the document (I'm using Texnic Center) or
- after I created the document manually (via command line)
I know, digitally signing is possible to do with MS-word documents (I tried that with my certificate) and following google, it's probably possible with Adobe, too.
With invisible digitally signing, I don't mean to add my written signature inside the document, but rather the signing via CA certificate, so that the user knows, that I was the one creating it and that the document has not been modified or changed, but came in the form, that I was creating it.
So, what would be the best way for me to digitally sign my Latex pdf documents?
Best Answer
There is an answer to this question on askubuntu: https://askubuntu.com/questions/147379/how-do-i-digitally-sign-a-pdf/608449#608449
gpg --clearsign --output=signed.pdf input.pdfThe user can check the signature with
gpg --verify signed.pdf