c# - How to add a certificate into a PDF file and check whether the pdf is not tampered externally? -



c# - How to add a certificate into a PDF file and check whether the pdf is not tampered externally? -

i working on pdf related operations, , need check whether pdf not tampered users or not. assume, requires digital signature added file. how create sure pdf not tampered?

i using pdfsharp pdf manipulation, , don't think pdfsharp can not sure. there thought whether can or not?

c# pdf certificate digital-signature digital-certificate

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