Domain 3 set 2

Question 1

IDEA

Answer 1

Used by PGPAn Symmetric Algorithm & Block Algorithm

Question 2

3DES Algorithm type?Block or stream?# of rounds?

Answer 2

Symmetric Algorithm Block Algorithm48 Rounds

Question 3

3DES was replaced by?

Answer 3

AES

Question 4

BlowFish Algorithm type?Block or stream and size?# of rounds?

Answer 4

Symmetric Algorithm
 Block Algorithm
64-bit block size
48 Rounds
public

Question 5

TwoFish Algorithm type?
Block or stream and size?
key length?

Answer 5

Symmetric Algorithm
128 bit block size
key length 128, 192 or 256 bits

Question 6

Symmetric Algorithm only gives you what?

Answer 6

Privately

Question 7

Stream Ciphers use What?

Answer 7

XOR

Question 8

XOR

Answer 8

if values are:
A like = 0 value
Different = 1 value

Question 9

Block Crypto have to be what type of Algorithm ?

Answer 9

Symmetric Algorithm

Question 10

Symmetric Block Algorithms are?

Answer 10

1. AES - Standard
2. 3DES - More cpu intenced (slower)
3. P2P - IDEA used in mail

Question 11

the slower Algorithm is?

Answer 11

Asymmetric

Question 12

Other names for Symmetric Algorithm?

Answer 12

1. Private Key
2. Secret Keys
3. Share Keys
4. Session Keys

Question 13

Shared Key Crypto?

Answer 13

Symmetric Algorithm

Question 14

Kerchoff’s Principle Means?

Answer 14

Keep the Key Secret,
The algorithm is Publicly known.
** Openness **

Question 15

What is Diffusion in Block cipher ?

Answer 15

Transposition

*** Plain Text is Added with the Cipher text

Question 16

What is Confusion in Block cipher ?

Answer 16

Relates to Substitution

** Good Strong Math)

Question 17

Diffusion and Confusion is used in what?

Answer 17

Symmetric Algorithm

Question 18

Two Primary Attributes To Symmetric Algorithm Block cipher?

Answer 18

Diffusion and Confusion

Question 19

Another way to say Cipher?

Answer 19

Algorithm

Question 20

The 5 Desirable qualities of an Algorithm

Answer 20

1. Diffusion
2. Confusion
3. Avalanche = A charter change Cascades through the text
4. Permutations = Rounds
5. openess = Kerchoff’s Principle

Question 21

Algorithm rounds are also called ?

Answer 21

Permutations

Question 22

Sue-do Randam Numbers is also called?

Answer 22

Initialization Vector

Question 23

Security Services provided by Cryptography?

Answer 23

P = Privacy
A= Authenticity
I = Integrity
N= Non-Repubiation

Question 24

Authenticity does what?

Answer 24

Verifies the Claimed Identity

Question 25

The 4 Requirements for Vernam Cipher (one Time Pad)

Answer 25

1. The Key must be used only once.
2. The Pad Must be at least as long as the Message
3. Key Pad is Statistically Unpredictable
4. The key Pad must be delivered and stored securely.

Question 26

The only unbreakable Mathematically cryptography is?

Answer 26

Vernam Cipher (One Time Pad)

Question 27

The Cipher that the first letter of the key is matched up against the first letter of the message?

Answer 27

Polyalphabetic Cipher (VIGNERE)

Question 28

First Polyalphabetic Cipher ?

Answer 28

VIGNERE

Question 29

A cipher that was wrapped rounded a rod?

Answer 29

ScytaleThe size (diameter) of the rod was the secret key

Question 30

A cipher that are subject to pattern analysis

Answer 30

Substitution Ciphers(Caesar Cipher)

Question 31

Caesar Cipher was what type of Cipher?

Answer 31

Substitution Ciphershift characters (3) spaces

Question 32

The Security Model That Protects Integrity?

Answer 32

BIBA Model and Clark-Wilson

Question 33

The Security Model That enforces well-formed transactions?

Answer 33

Clark-Wilson

Question 34

Clark-Wilson uses what for Separation of duties?

Answer 34

API’s

Question 35

RC4
Stream or block
Algorithm ?

Answer 35

stream
Symmetric Algorithm
variable length key

Question 36

to create RSA keys use use what?

Answer 36

two large prime numbers