Mailinglist Archive: opensuse (878 mails)

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Re: [opensuse] Signing PDFs
On 2015-08-06 20:12, Chris Murphy wrote:

Those grocery store pads where you use a fake pen to sign your name on
a touch sensitive screen? Complete b.s. Ask any handwriting expert and
they'll explain it but basically there is no angular or pressure
information conveyed in that signature which is integral in pen on
paper handwriting analysis and signature authentication.

Good point.

And you as the creator of this document shouldn't send one that isn't
editable, and is digital signed in such a way that at least it's
provable that the document has been altered since it was signed. So if
some company asks for a PDF with a handwritten signature, you should
still digital sign it with at least your own self-signed cert, to
encrypt it, prevent it from being edited, and thus able to prove
whether it's been modified since signing.

Ah. Didn't think of that.

How would you create such a signature in Linux? :-?

You can also disallow
printing and copying of such a PDF (within the limits of software
honoring this policy, obviously the fact it's being displayed at all
means anyone could do an end run around the no printing policy).

Why? They may have need to print in order to file in paper. :-?

Cheers / Saludos,

Carlos E. R.
(from 13.1 x86_64 "Bottle" at Telcontar)

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