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I'm trying to do a digital signature with adobe reader (pades signature, extension .pdf). When I verify my signed document with Adobe, re opening it, everything is ok, it tells me "valid digitale signature". But when I verify the document with another software for the digital signature (for example: aruba sign, Dike) it tells me that the signature IS NOT VALID, or NOT PRESENT. Which is the problem of the adobe signature?
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Hi francescac93756866,
You may visit this help page Validating digital signatures, Adobe Acrobat and let us know if this helps.
-Tariq Dar.