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Questions for LTV display problems!

New Here ,
Dec 19, 2023 Dec 19, 2023

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I'm currently using a non-LTV timestamping service but when I open a file in Adobe AcrobatReader, it shows as LTV enabled. What could be the cause of this problem?

And I have one more question.

Using a same file and open it in Adobe AcrobatReader, one shows LTV enabled and other is non-LTV. this happens sometimes depending on the person, please let me know the cause of this as well.

 

Thanks for your help!

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How to , Modern Acrobat

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Community Expert ,
Dec 24, 2023 Dec 24, 2023

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What is an LTV-display?

ABAMBO | Hard- and Software Engineer | Photographer

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Community Expert ,
Dec 25, 2023 Dec 25, 2023

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I believe the Op is referring to the long-term validity of the signed agreements.

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Community Expert ,
Dec 25, 2023 Dec 25, 2023

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New Here ,
Jan 27, 2024 Jan 27, 2024

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I checked them, but there were not enough information about LTV.

I want to know how the system decide whether or not a file is LTV available.

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Community Expert ,
Feb 10, 2024 Feb 10, 2024

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Hi @Aoi35050081ungj ,

 

To learn how the system decide wether or not a file is LTV involves different steps from the moment the signature was created and assigning the required chain of trust mechanisms to the certificate-based signature at signing time.

 

Doing so, will ensure (or at least in theory) that the signed document will remain valid and verifiable past the lifetime of the embedded time-stamp of that certificate-based digital signature .

 

I would say that it is not the system that decides, but a series of standards and PDF specifications that define the mechanisms that will verify or enforce the validity of a signed document.

 

This is explained in more detail in the links that I am sharing below, in particular this discussion:

 

 

Which complements the second link that I posted earlier for the OP: Validating digital signatures, Adobe Acrobat and also complements this link: Long-Term Validation (LTV) of PDF Digital Signatures in Adobe Acrobat - SSL.com

 

See more in-depth information here:

 

 

 

 

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