1. The Caesar cipher is the oldest known encryption method.
True
False
2. An improvement on the Caesar cipher that uses more than one shift is called a(n) ________.
DES encryption
multialphabet substitution
IDEA
Triple DES
3. What type of encryption uses a different key to encrypt the message than it uses to decrypt the message?
Private key
Asymmetric
Symmetric
Secure
4. Which of the following is an asymmetric cryptography algorithm invented by three mathematicians in the 1970s?
PGP
DES
DSA
RSA
5. Which of the following encryption algorithms uses three key ciphers in a block system and uses the Rijndael algorithm?
DES
RSA
AES
NSA
6. What is the key length used for DES?
56
64
128
256
7. Which of the following is an example of a multialphabet cipher?
Caesar
Vigenère
Atbash
ROT13
8. How many rounds does DES have?
64
56
16
4
9. Hiding messages inside another medium is referred to as ________.
cryptography
cryptology
steganalysis
steganography
10. In steganography, the ________ is the data to be covertly communicated. In other words, it is the message you want to hide.
payload
carrier
signal
channel
11. In steganography, the ________ is the stream or file into which the data is hidden.
payload
carrier
signal
channel
12. The most common way steganography is accomplished is via ________.
MSB
ASB
RSB
LSB