I validated a digital signature in pdf using Adobe Acrobat Reader DC in windows 8.1. Later, when I opened that pdf file(Digital signature validated) in Android using Adobe Reader for Android(tried different pdf reader for android though), it is again showing signature not verified. Also when I attempt to print that pdf file from Windows 8.1(where the pdf file is showing as Signature valid), the print out is showing that signature not verified, What is the way to view the validated digital sign in android smartphone and on the printing paper?
Validating/verifying a signature isn’t something you do once, which marks the file as “trust me it’s fine”. It’s domething that has to be redone every single time it’s opened. Meaningless on paper, digital signatures need digital trust.