Participating Frequently

Question

Unable to Verify Signature after 250 Pages

Forum|Forum|1 year ago
October 21, 2024
4 replies
5984 views

I have Can anyone help in this is problem ? I have a pdf of 312 pages and all pages are digitally signed from a digital signature pendrive which is issued by a trusted authority, Problem is i am unable to verify signature after 250 pages means from page 1-250 all pages shows signature is valid, from 251-311 it says unable to verify signatures it shows me red cross and at last page 312 it again shows that signature is verified.If it was problem of pdf then please note that i have already tried it with many pdfs there is not a problem from pdf side, i think only adobe reader cannot verify siganture after 250 pages. Please someone help me in this.

GDFER_SIGNED.pdf

S

shaktikeshri

Adobe Employee

Hi,

Sorry for the inconvenience caused. We are able to reproduce the issue in the testfile shared by you. We are investigating further to debug the issue here. Is there any specific reason that signing is required on each page?

Thanks,

Shakti K

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⠀MG⠀Author

Participating Frequently

Is there any specific reason that signing is required on each page?

Hi,

Yes all the document in PDF are necessary to sign on each page, due to some legal reason, In short every page comes with a different agreement so it is mendatory to sign on every page.

Thanks & Regards

Mayank Gupta

MikelKlink

Participating Frequently

If the pages constitute different legal agreements, have you considered putting them in separate single-page documents, signing each of them, and bundling them in a portable collection (aka portfolio)?

R

Raeben

Known Participant

If as as stated below the limiting factor is the number of pages perhaps changing the page size would remedy.

MikelKlink

Participating Frequently

If as as stated below the limiting factor is the number of pages perhaps changing the page size would remedy.

The number of pages is limiting only because the op wants to "digitally sign each page". The actual limiting factor is the number of digital signatures.

Also for the legal documents mentioned by the op there may be a prescribed page size for such communications.

MikelKlink

Participating Frequently

If you configure Acrobat to not validate the signatures on startup (Preferences -> Signatures -> Verification -> Verify signatures when document is opened), Acrobat opens your file without issue. And if you then choose some individual signatures on the Signature Panel and click "Validate Signature" in their respective context menus, you'll see that you can successfully validate all of them.

Thus, Acrobat can verify siganture after 250 pages, you merely have to do it manually and probably close and re-open the file each time after verifying some 50 signatures.

Alternatively you can try some other signature validators. Beware, though, validation web services are likely to run into timeouts when validating all the signatures of your document.

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⠀MG⠀Author

Participating Frequently

It is set to automatically validate after opening because when even i open PDF It starts a long process to verify each signature then when all signature gets verfied from CRL Url or certifiying authority, then pdf gets loaded with signed pages and as usual currently facing issue of red cross after 250 signatures.

MikelKlink

Participating Frequently

With default settings the current Acrobat version apparently cannot properly validate files with many digital signatures like yours.

My previous answer only pointed out that Acrobat can validate all the signatures in your document by manual work and re-opening the PDF multiple times. But this of course is nothing you can expect others to do who have to validate the signatures in your document as part of their job.

try67

Community Expert

There is absolutely no need to sign every page in the file. A digital signature applies to the entire file as a whole, not just to the page where it is placed. In fact, it doesn't need to appear on any page at all, and can still be valid.

Signing a file so many times is very likely to destabilize it. Inform whoever did this that it's not necessary at all.

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⠀MG⠀Author

Participating Frequently

I understand your concern that a single signature is valid for whole doument but when it comes to digital sign a legal document where a person is required to sign every page where it is mentioned that at this area in this pdf on this page no signature is required then we have to do, i need a explanation why i am unable to validate signature after 250 pages. Please help.

try67

Community Expert

This is not a logical requirement, but OK. If you really need a "visual" signature on each page use something like a stamp and then digitally sign the file once at the end.

As I said, that many (digital) signatures can destabilize a file and even corrupt it. I'm guessing this is what happened here.

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