~/talk

Perfectly Deniable Steganographic Disk Encryption

Talkat Black Hat Europe 2018 · 2018-12-03..12-06· [security, cryptography]
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slides:none on file

A working steganographic disk system is implemented as a Linux kernel module (about 30,000 lines) plus tiny assembly bootstraps that self‑bootstrap from scattered slack sectors (bootstrap‑in‑sectors). Data is spread with randomized placement and recovered with forward error correction using LDPC, allowing recovery even after roughly 50% overwrite of slack space. It runs fast on NVMe, can host a hidden OS (even VirtualBox), and survives normal cover use; practical limits include multi‑snapshot forensics and SSD/TRIM/FTL quirks that weaken guarantees.

AI-written summary · about

  1. 0:00Introduction
  2. 1:04Outline
  3. 2:21Steganography
  4. 4:54topical applications
  5. 7:53Forensic Analysis Techniques
  6. 8:36Essential Ingredients
  7. 9:30Background
  8. 10:02Vanilla Disk Encryption
  9. 10:55Hidden Partition Functionality
  10. 12:26Veracrypt
  11. 13:24Practice
  12. 15:04Problem Solution
  13. 15:58Birds Eye View
  14. 16:52Air Correction
  15. 18:31Randomization
  16. 20:25Kernel Architecture
  17. 24:27In Practice
  18. 39:39Takeaways
  19. 41:51System Health
  20. 45:34Questions
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