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[Music] so the next talk is on how to break PDFs breaking the encryption and the signatures by Fabian icing and Vladislav Mladenov their talk was accepted at CCS this year in London and they had that in November it comes from research that basically produced two different kinds of papers and it has been people worldwide have been interested in what has been going on please give them a great round of applause and welcome them to the stage [Applause] [Music] so can you hear me yeah perfect okay now you can see the slides um my name is larsa Fernando for just Vladdy if you have some questions to me and this is Fabian and we are allowed today to talk about how to break PDF security or more special about how to break the cryptography operations in PDF files we are a large team from university on both whom mnster and hackman eat game behalf so um as I mentioned we will talk about cryptography in PDF files does it work alright ok lets try that again ok perfect this talk will consist of two
