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Graph/so-79226467

Answer

so-79226467

so-79226467

so-79226467

Node Details

Public graph metadata

PageRank0.0000

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2 linked nodes

PROPOSESSolution

you have to know these user details in preparation phase before signing — If you want the signature appearance to contain user details. Tension: If retrieving them from the signature is the only option you have. Outcome: you may have to create two signatures: The first one for dummy data to extract user details from the signature, the second one for the PDF prepared with those user details.

PROPOSESSolution

you need to hash the prepared PDF (with signature dictionary containing the placeholder) — If you want any decent PDF signature validator to positively validate your signature. Tension: not something else. Outcome: validators expect that the signed byte ranges encompass exactly everything except the placeholder itself.

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