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Jens Miller, a Ph.D. candidate at the University of Bohol, presents on breaking PDF encryption in collaboration with the University of Applied Sciences in Munster. Their research introduces PDF acceleration (PDFX), uncovering two novel attacks on PDF encryption. The first attack, direct exfiltration, exploits flaws in the PDF data format structure allowing for partial encryption. The second attack, mobility gadgets, exposes vulnerabilities in the US block cipher modes of operation. Jens Miller outlines the talk agenda, presenting the findings and implications of their research on PDF security.