Abstract
We present a steganalytic attack against the PDF component of the popular OpenPuff tool. We show that our findings allow us to accurately detect the presence of OpenPuff steganography over the PDF format by using a simple script. OpenPuff is a prominent multi-format and semi-open-source stego-system with a large user base. Because of its popularity, we think our results could potentially have relevant security and privacy implications. The relative simplicity of our attack, paired with its high accuracy and the existence of previous steganalytic findings against this software, warrants major concerns over the real security offered by this steganography tool.
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