IST 317
Fall, 2015
Homework #11
Begin reading Chapter 9: Encrypting volumns.
Answer the following questions:
1.
What is the difference between file encryption and volume encryption.
2.
What is the fundamental difference between block and stream ciphers?
3.
Describe the steps performed by a typical block cipher.
4.
Suppose you encrypt some data with a block cipher and suppose the ciphertext suffers a
1-bit error. How does this effect the plaintext after the ciphertext is decrypted?
5.
Summarize the six qualities of good encryption algorithms.
6.
Describe how a self-encrypting drive controller works.
7.
Look up the “Feistel structure” and describe how it relates to block ciphers.