CSCI 670 Principle of Information Technology
Chapter 3 Worksheet
Name_________________________________
Based on Chapter 3 of Blown To Bits, answer the following questions about data
representation.
1. Bob highlights a sensitive message in a Word document and changes its color to white to
match the background of the document so others won't see it. If he sends this document to
Alice, does she have the sensitive information? Why or why not?
2. What is spatial coherence and temporal coherence with respect to images? How does each
concept allow us to transmit images using fewer bits?
3. Steganography is the hiding of information within other information. Using one of the
examples given in the chapter as a guide, find the hidden message in the following
announcement:
Important Liability Information: Keep employees productive! Reduce
injuries now. Carefully inspect packages, listing each sender on formatted
cards. On Mondays, please unload trucks inside North garages.