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1 commentaire

MikelKlink
Participating Frequently
May 15, 2022

Having only that screen shot to go by, I obviously merely can guess.

 

Seeing the cyrillic characters in your document makes me guess that the "unsupported public key algorithm" in the error message may be a GOST algorithm.

 

By default Adobe Acrobat does not support these Russian norm. I've read somewhere that there are some plugins for Adobe Acrobat that add GOST support but I don't know any specifics.