Domain 3 set 6

Question 1

A standard proposed by credit card issuers but never became widely adopted.

Answer 1

Secure electronic transaction (SET)

Question 2

Ciphers that use multiple alphabets on a rotating basis.

Answer 2

Polyalphabetic substitution

Question 3

Chosen Plaintext Attack

Answer 3

The attacker can create an encrypted message of his choice, to figure out the key.

Question 4

AES key lengths.

Answer 4

128, 192, 256

Question 5

Cryptography

Answer 5

The science of protecting data so that it may be stored and transmitted between parties while preserving confidentiality and/or integrity.

Question 6

Twofish key length.

Answer 6

256 bits

Question 7

DES modes that allow errors to propagate.

Answer 7

CBC, CFB

Question 8

Frequency Analysis?

Answer 8

Used to detect patterns in ciphertext.

Question 9

Digital signatures use what type of algorithm?

Answer 9

Asymmetric

Question 10

NAND (not AND)

Answer 10

Logical function that is true only when one or both elements are false.

Question 11

AND

Answer 11

Logical function that is true only when both arguments are true.

Question 12

3 main product evaluation models?

Answer 12

1. TCSEC Orange book
2. ITSEC
3. Common Criteria

Question 13

What is it called when you fill a known gap in physical security?

Answer 13

Compensating Control ( placing a guard at the gate entry)

Question 14

NOT

Answer 14

Logical function that is true only when a single argument is false.

Question 15

RC5 key length.

Answer 15

up to 2048 bits

Question 16

Cryptology

Answer 16

The science that involves the use of codes and cyphers to obscure the meaning of a message.

Question 17

Cryptanalysis

Answer 17

The science of breaking cryptographic algorithms to obtain the secret message without authorization.

Question 18

Hash that produces a 160 bit digest.

Answer 18

SHA-1

Question 19

AES?
Types of algorithm
block or stream

Answer 19

Symmetric

128 bit Blocks

Question 20

AES block length.

Answer 20

128 bits

Question 21

NOR (not OR)

Answer 21

Logical function that is true only when both elements are false.

Question 22

Rijndael is what encryption?

Answer 22

AES

Question 23

Blowfish key length.

Answer 23

32 to 448 bits

Question 24

Four modes of DES encryption.

Answer 24

ECB, CBC, CFB, OFB

Question 25

how 3DES modes modes?

Answer 25

3

Question 26

Statistical

Answer 26

Uses a mathematical analysis of a message to break the cryptosystem.

Question 27

Mail encryption that uses 3DES, RSA, MD5, and X.509.

Answer 27

Privacy enhanced mail (PEM)

Question 28

Four modes of 3DES.

Answer 28

DES-EEE3, DES-EDE3, DES-EEE2, DES-EDE2

Question 29

AES key size and rounds?

Answer 29

128 bit - 10 rounds
192 bit - 12 rounds
256 bit - 14 rounds

Question 30

Cryptosystems

Answer 30

Sets of techniques that implement cryptography.

Question 31

What is the differant in a Code then a cipher?

Answer 31

A Code is a system the substitutes one word or phrase for another for secrecy or efficiency. Example the 10 code used by police (10-20).

Question 32

Hash that produces a 256 bit digest.

Answer 32

SHA-256

Question 33

XOR (exclusive OR)

Answer 33

Logical function that is true only when one of the elements is true and the other is false.

Question 34

Known plaintext attack

Answer 34

the attacker has access to the unencrypted message

Question 35

3DES?
Types of algorithm
rounds
key length

Answer 35

Symmetric
64- bit Blocks
48 rounds
key length 112 bits