Remaining Covert in an Overt World: Steganography & Covert Channels
Michael Raggo and Chet Hosmer explore digital steganography techniques, demonstrating covert data exfiltration hidden within social media images and audio.
Summary
The Evolution of Digital Steganography
As perimeter DLP solutions and deep packet inspection inspect traditional data streams, attackers and privacy advocates turn to steganographic carrier files.
Embedding Payloads in Images and Streaming Media
Michael Raggo and Chet Hosmer explain Least Significant Bit (LSB) insertion, transform domain hiding (DCT), and echo hiding in audio streams.
Exfiltrating Data Over Social Media Platforms
The speakers showcase exfiltrating sensitive corporate files disguised as profile pictures uploaded to Facebook, Twitter, and Flickr without compression loss.
Steganalysis and Detection Methodologies
The authors review statistical steganalysis algorithms and forensic tools capable of detecting anomalous entropy in suspect media files.
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