Deck 6: Encryption and Password Cracking

Question 1

Transposition relies on length of password.

Answer 1

False

Question 2

Block ciphers operate on blocks of data.

Answer 2

True

Question 3

As might be expected,Triple DES is almost three times faster than DES.

Answer 3

False

Question 4

DSS stands for the United States government's Digital Signature Standard, which is based on the Digital Signature Algorithm (DSA).

Question 5

Whether or not encryption is used, the use of password protection is open to various kinds of attack.

Question 6

____ is a change in the position or order of letters or words, as in an anagram.

A)Exchange
B)Substitution
C)Transposition
D)Diffusion

Question 7

____ is the replacement of a letter or group of letters with another letter or group of letters.

A)Substitution
B)Diffusion
C)Exchange
D)Transposition

Question 8

____ ciphers use a key stream to encrypt and decrypt a plaintext message.

A)Block
B)Bit
C)Packet
D)Stream

Question 9

____ is a method for secure key exchange over an insecure channel based on the nature of photons.

A)Skipjack
B)Quantum cryptography
C)RC4
D)IDEA

Question 10

____ attacks use all possible combination of letters, numbers, and special characters to determine the target password.

A)Brute-force
B)Dictionary
C)Hybridization
D)LC5

Question 11

____________________ uses an algorithm to encrypt a ciphertext document from a plaintext document, and when the information is needed again, the algorithm is used to decrypt the ciphertext back into plaintext.

Question 12

Sometimes called secret key algorithms, ____________________ key algorithms use the same key to encrypt and to decrypt the data.

Question 13

Also called public key algorithms, ____________________ key algorithms use two keys for encrypting and decrypting data.

Question 14

The ____________________, also known as Rijndael, is a block cipher adopted as an encryption standard by the U.S. government.

Question 15

____________________ is a secure hash algorithm developed in 1992 by Ron Rivest,one of the inventors of RSA.

Question 16

Briefly describe Enigma.

Question 17

Describe some of the most common terms you need to know when dealing with cryptography.

Question 18

Briefly describe 3DES.