Adding a file to pdf as attachment

[CodeBoT]

I tried the function "FPDFDoc_AddAttachment(FPDF_DOCUMENT document, FPDF_WIDESTRING name);" to attach a file to the pdf .

But the problem with this is that when i open the pdf in adobe acrobat reader or any other pdf reader then I can easily see the attachment file from there.

So my question here is that is there any other method or way to attach a file to the pdf which only I can access/see or open in future after attaching to the pdf, i.e. the file should be visible only to me. Not to any other person or program,

[Lei Zhang]

I fail to see how the described behavior is a problem. If you want to
come up with a proprietary way of adding attachments to PDFs, you are
welcome to do that on your own.

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