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Welcome to a talk on breaking PDF encryption by Jens Miller, a PhD candidate at the University of Bohol. The research on PDF acceleration, in collaboration with the University of Applied Sciences in Munster, introduces two novel attacks on PDF encryption. The attacks exploit weaknesses in the PDF standard, one involving flaws in the data format structure, and the other in the US block cipher modes of operation. Jens will discuss these attacks - direct exfiltration and mobility gadgets - in detail in today's presentation.