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Question

Problemas con la firma de documentos

Forum|Forum|9 months ago
May 28, 2025
3 replies
1206 views

Hola a todos,

Estoy experimentando un problema peculiar con la firma de documentos en Adobe Acrobat. Al firmar ciertos documentos, Adobe los marca como erróneos. Lo curioso es que estos mismos documentos pasan la validación sin problemas en otras herramientas, como el validador de la Unión Europea, el del Gobierno de España y otros programas de terceros.

Parece que el problema es específico de Adobe. ¿Alguien más ha experimentado esto o tiene alguna idea de por qué podría estar sucediendo? Cualquier sugerencia o solución sería de gran ayuda.

JR Boulay

Community Expert

[MOVED TO THE ACROBAT SIGN DISCUSSIONS]

Acrobate du PDF, InDesigner et Photoshopographe

MikelKlink

Participating Frequently

[MOVED TO THE ACROBAT SIGN DISCUSSIONS]

@JR Boulay Aren't the 'Adobe Acrobat Sign' discussions focused on the Adobe Acrobat Sign cloud service? The question here seems to be about the validation of digital signatures that are not created by that service, in the desktop Acrobat application.

Meenakshi Negi

Legend

Hi ivan_8737 ,

Thank you for the information.

If the issue occurs with a particular document, could you share the PDF with us to check?

Also, please let us know how the document was signed. As you mentioned, other documents were signed using the same method, and using the same certificate shows that they are valid. To confirm, do you mean all other documents signed by the same person using the same certificate?

Thanks,

Meenakshi

I

ivan_8737Author

Participant

Thank you for your responses.

The problem is that the same certificate, using the same signing method, works correctly and validates in Adobe for other, different PDFs. For this reason, I can rule out the certificate itself or the signing algorithm as the cause.

What catches my attention is:

MikelKlink

Participating Frequently

For a more specific answer, please share a signed PDF that illustrates the issue.

MikelKlink

Participating Frequently

Such problems usually either are due to errors in the PDF file or use of unsupported algorithms.

If Acrobat needs to repair certain kinds of errors at load time, it validates contained signatures in the repaired data, but the repair process obviously invalidates the signature. The EU DSS validator on the other hand validates the original data.

The range of cryptographic algorithms supported by Acrobat is fairly small. For example, Acrobat started supporting RSASSA-PSS only when it was already in wide use.

For a more specific answer, please share a signed PDF that illustrates the issue.

Meenakshi Negi

Legend

Hi ivan_8737,

Thank you for reaching out, and sorry about the trouble.

It usually happens when the Root CA certificate verifies the signature isn't on your trusted list. Please refer to the information on validating the signature in the following help document: https://helpx.adobe.com/acrobat/using/validating-digital-signatures.html. Check if that helps.

If that is not the case, we would require more information. Please confirm how the document was signed. Do you experience this behavior with other signed PDFs?

Feel free to let us know if you need any help.

Thanks,

Meenakshi

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