13.1. Top 10 Reasons Why Top 10 Lists Fail13.2. Introduction13.3. Strength Against Scrambling13.4. Invariant Forms13.5. Canonical Forms13.6. Packing in Multiple Messages13.7. Sorting to Hide Information13.8. Word Scrambling13.9. Adding Extra Packets13.10. Port Knocking13.11. Continuous Use and Jamming13.12. Summary