Digital signature feature

[MVitorino]

Hi,

Does the PDF24 roadmap development includes a feature to allow an easy way, like a button on the main screen, to sign pdf files with a digital signature from several different keystore types like a citizen card reader or token and with these simple steps:

1. select visible or invisible signature;
2. draw the signature area;
3. display activate certificates to select from;
4. apply certificate (also ask for security pin if that's the case);
5. if successfull ask to save new filename suffix, like "-signed"

Should have this features:

• timestamps from authority in signature (TSA)
• certificate validation through CRL and/or OCSP

Best regards

[Stefan Ziegler]

We already have tasks on our list to improve the signing process. I've also added this question to the list so that your points flow in. At the moment I can't say when all these tasks will be implemented. It's too soon for that. We have a lot of points on our list and we try to make the PDF24 Creator really really cool and signing is one of the features we like.

[oliu]

Is this feature now available ?

When I use a certificat on the profil (and check "use a signature"), and if I open the pdf on Acrobat Reader DC, the signature is not validate. error : "The time of signature is determined based on the time on the signer's computer."

I think the date/time may be on UTC time

Best regards

[Stefan Ziegler]

Signing PDF fiels with a certificate is possible via the profiles section, there are options where you can also select a certificate. Such a signature just digitally sings but does not add a visual representation of the signature to the document. If you need this often, just add a custom profile with that certificate and later of you can just apply that profile to files.

[loic]

Hello,
This is a question I asked recently, but not with all of all MVitorino's suggestions. I'm also eagerly awaiting it!
And thank you again for this magnificent work, Stefan!

[loic]

..👍..

[PDF24 Support]

Hello,

thank you for the feedback. Here is the current state:

• Online: The tool https://tools.pdf24.org/en/sign-pdf can now sign PDF files digitally. Switch to Sign, place a visible signature on the page or tick Sign without a visible signature, and choose a certificate: the PDF24 certificate (self-signed) or your own certificate file (.p12/.pfx), which stays on your device. Optionally you can request a timestamp (TSA) and enter name, reason and location.
• PDF24 Creator: Signing with a certificate when saving as PDF is possible as described above (without a visible signature). With the next version this signature can also include a timestamp from a timestamp service and validation data (LTV), and certificates on smart cards and tokens are supported better.

The message in Adobe Acrobat that the signing time is based on the signer's computer appears when a signature has no timestamp. With a timestamp, the signing time is confirmed by the timestamp service.

[Author]

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