Discover and read the best of Twitter Threads about #pdfex
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New Paper: “Practical Decryption exFiltration: Breaking PDF Encryption“ describing new attacks that uncover the plaintext of encrypted PDFs. To be presented at @acm_ccs and joint work with @jensvoid @Murgi @v_mladenov @CheariX @JoergSchwenk. #PDFex 1/n 
@acm_ccs @jensvoid @Murgi @v_mladenov @CheariX @JoergSchwenk Do you remember the efail.de attacks against S/MIME and OpenPGP encrypted emails? It’s basically that but against encrypted PDFs. Paper: pdf-insecurity.org. #PDFex 2/n
@acm_ccs @jensvoid @Murgi @v_mladenov @CheariX @JoergSchwenk The attacker modifies an encrypted PDF and sends it to the receiver. The receiver opens and decrypts the modified PDF and the viewer immediately sends the plaintext of the PDF to the attacker. #PDFex 3/n
