alt Hacker NewsPDF files can be signed, that is tamper resistance. Tamper resistance doesn't have to make any difference to the readability of the document.
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ranger_danger • yesterday at 5:38 PM
Can't one just remove the signature and re-sign it with anything else after tampering? Who verifies PDFs that hard?
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So can any type of file -- that doesn't have any relevance to the supposed design of every file type in existence. Now, later versions of PDF do have explicit support for signatures, but what does this have to do with preventing OCR? OCR reads a file, it doesn't change the original file.