PDFlib PLOP and PLOP DS 5.1 – Digital Signatures in PDF – is now released. Customers can download a free trial at http://www.pdflib.com/download/plop-and-plop-ds/.
On February 25, 2019, researchers from Ruhr University Bochum and Hackmanit GmbH published pdf-insecurity.org, a detailed explanation of several vulnerabilities they had identified in PDF viewers and online validation services relevant to signature validation in digitally-signed …
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