Lesson 5

Question 1

breaking and finding a weakness in a given algorithm

Answer 1

cryptanalysis

Question 2

private key cryptography, utilizes a single key for encryption and decryption

Answer 2

symmetric cryptography

Question 3

public key cryptography, utilizes public and private key

Answer 3

asymmetric cryptography

Question 4

keyless cryptography that creates a unique and fixed length hash value based on the original message, integrity check

Answer 4

hash functions

Question 5

allows users to sign a message in order to enable detection of changes to message contents

Answer 5

digital signatures

Question 6

created to link a public key to a particular individual

Answer 6

certificate

Question 7

symmetric key cryptography uses these ciphers (2)

Answer 7

block and stream

Question 8

takes a predetermined number of bits and encrypts that block

Answer 8

block cipher

Question 9

encrypts each bit in a plaintext message, 1 by 1

Answer 9

stream cipher

Question 10

this cipher is more commonly used, slower but more efficient, resource intensive and complex

Answer 10

block cipher

Question 11

block cipher using a 56-bit key, no longer considered secure

Answer 11

DES (symmetric)

Question 12

uses DES to encrypt each block 3 times, operates in different modes (CBC, ECB, CFB, OFB, CTR)

Answer 12

3DES (symmetric)

Question 13

uses 3 different ciphers with 128-bit key, 192-bit key, and 256-bit key, all having a block length of 128 bits

Answer 13

AES (symmetric)

Question 14

used in SSL

Answer 14

RSA (asymmetric)

Question 15

used in SHA-2, ECDSA

Answer 15

ECC (asymmetric)

Question 16

used for encrypting messages and files, was originally symmetric

Answer 16

PGP (asymmetric)

Question 17

SHA-2, SHA-3, MD5, RACE

Answer 17

hash algorithms

Question 18

cryptography protects data in these states (2)

Answer 18

rest, motion