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The difference between two PDF / A documents - an electronic signature

New Here ,
Aug 18, 2020

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We have two similar PDF / A documents created by the same application. Signatures were gradually added to the documents - in the OK document it is possible to add additional signatures and nothing will happen from the previous ones. For a KO document, the previous signature is always canceled - it then writes to the signature that the document has been changed or violated.
Such invalid signatures are displayed only in Acrobat, in other verifiers (including our QVerify) the signatures in both documents appear to be valid.
The goal is to find out what is wrong in the KO document, why it is not possible to add additional signatures there. Even if we return to the revision, where there is only the first signature, we save the document again and add another signature, then the first signature will be canceled.

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Security digital signatures and esignatures

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The difference between two PDF / A documents - an electronic signature

New Here ,
Aug 18, 2020

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We have two similar PDF / A documents created by the same application. Signatures were gradually added to the documents - in the OK document it is possible to add additional signatures and nothing will happen from the previous ones. For a KO document, the previous signature is always canceled - it then writes to the signature that the document has been changed or violated.
Such invalid signatures are displayed only in Acrobat, in other verifiers (including our QVerify) the signatures in both documents appear to be valid.
The goal is to find out what is wrong in the KO document, why it is not possible to add additional signatures there. Even if we return to the revision, where there is only the first signature, we save the document again and add another signature, then the first signature will be canceled.

Topics

Security digital signatures and esignatures

Views

12

Likes

Translate

Translate

Report

Report
Community Guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
Aug 18, 2020 0
Jarosova LATEST
New Here ,
Aug 18, 2020

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We have two similar PDF / A documents created by the same application. Signatures were gradually added to the documents - in the OK document it is possible to add additional signatures and nothing will happen from the previous ones. For a KO document, the previous signature is always canceled - it then writes to the signature that the document has been changed or violated.
Such invalid signatures are displayed only in Acrobat, in other verifiers (including our QVerify) the signatures in both documents appear to be valid.
The goal is to find out what is wrong in the KO document, why it is not possible to add additional signatures there. Even if we return to the revision, where there is only the first signature, we save the document again and add another signature, then the first signature will be canceled.

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Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
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