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I want to manually verify the signature in PDF file. I found two signatures in the signature field "content <... >" using HxD.exe, one of them is for the entire file without the signature field, and the other I don't know which part of the content was made.
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Hi Sun
Hope you are doing well and sorry for the trouble. As described you want to manually verify the signatures in PDF file.
For information about verifying the signatures in PDF please check out the help page https://helpx.adobe.com/acrobat/using/validating-digital-signatures.html and see if that works.
Regards
Amal