Validate the Digital Signature has expired

We are a small and medium-sized companies and have the public keys of our employee in a read-only shared network folder. We use self-signed digital signatures created in Acrobat 9 and X.

My understanding is that digital signatures expire after 5 years.

  1. How do validate us a document that has been signed, but now that the digital signature has expired?
  2. We need to keep all public keys, including the former expired and newly created versions?
  3. File names are not the same? How to make them in the same folder with identical names?

You need to keep old certificates expired in Idetities of trust (with public keys only) to be able to validate the signatures signed with these certificates at the signature (the signature creation time). You don't need to keep expired certificates with the private keys.which are the files protected by password on your computer (or in the Windows or Mac keychain certificate store).

Tags: Acrobat

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