This document discusses how to investigate a corrupted graphics file to recover the original file and any hidden data. It also describes how to hide information in a bitmap image file using substitution steganography. The techniques discussed could be used to reconstruct a corrupted file header and extract any embedded hidden messages from the image data.

1. 1. You are investigating a file that is suspected to be a graphics
file with hidden content and data. The file has a corrupted
hexadecimal header. How would you proceed with your
investigation to reconstruct and recover the original graphics
file? What would you do to find any hidden data?
2. Describe how to hide information on a bitmap image file
(with 8-bit color depth) using substitution steganography.
approx 500 words (2 pages)