Deck 2: Cryptography and Security: Part A

Question 1

The is a polygraphic substitution cipher based on linear algebra.

A)hill cipher
B)playfair cipher
C)affine cipher
D)none of these

Answer 1

hill cipher

Question 2

______________is the practice of concealing a message within another message,image or file.

A)steganography
B)cryptography
C)cipher
D)receiver

Answer 2

steganography

Question 3

In asymmetric key cryptography, the private key is kept by ______________ 

A)sender
B)receiver
C)sender and receiver
D)none of these

Answer 3

receiver

Question 4

What is data encryption standard (DES)?

A)block cipher
B)stream cipher
C)bit cipher
D)byte cipher

Question 5

In cryptography the original message before being transform is called

A)simple text
B)plain text
C)empty text
D)filled text

Question 6

An asymmetric-key (or public-key) cipher uses

A)1 key
B)2 key
C)3 key
D)4 key

Question 7

In Asymmetric-Key Cryptography, although RSA can be used to encrypt and decrypt actual messages, it is very slow if the message is

A)short
B)flat
C)long
D)thin

Question 8

The man-in-the-middle attack can endanger the security of the Diffie-Hellman method if two parties are not

A)authenticated
B)joined
C)submit
D)separate

Question 9

In Asymmetric-Key Cryptography, the two keys, e and d, have a special relationship to

A)other
B)data
C)keys
D)each other

Question 10

For RSA to work, the value of P must be less than the value of

A)p
B)q
C)n
D)r

Question 11

In RSA, ?(n) = in terms of p and q.

A)(p)/(q)
B)(p)(q)
C)(p-1)(q-1)
D)(p+1)(q+1)

Question 12

In RSA, we select a value 'e' such that it lies between 0 and ?(n) and it is relatively prime to ?(n).

Question 13

RSA is also a stream cipher like Merkel-Hellman.

Question 14

USENET falls under which category of public key sharing?

A)public announcement
B)publicly available directory
C)public key authority
D)public key certificate

Question 15

PGP makes use of which cryptographic algorithm?

A)rsa
B)aes
C)des
D)robin

Question 16

Public key cryptography also called as__________________________________________ 

A)asymmetric key cryptography
B)symmetric key cryptography
C)both a and b
D)none of the above

Question 17

ECC stands for

A)elliptic curve cryptography
B)elliptic cryptography curve
C)error correcting code
D)none of the above

Question 18

Diffie-Hellman algorithm is widely known as__________________________________________

A)key exchange algorithm
B)key agreement algorithm
C)only a
D)both a and b

Question 19

Hash function is used for__________________________________________ 

A)message authentication
B)digital signature
C)both a and b
D)only a

Question 20

RSA algorithm is best example of____________________________   

A)asymmetric key cryptography
B)symmetric key cryptography
C)elliptic curve cryptography
D)all of the above

Question 21

IPSec is designed to provide security at the __________________________________________

A)transport layer
B)network layer
C)application layer
D)session layer

Question 22

In tunnel mode, IPSec protects the ____________________________

A)entire ip packet
B)ip header
C)ip payload
D)ip trailer

Question 23

An attempt to make a computer resource unavailable to its intended users is called ____________________________

A)denial-of-service attack
B)virus attack
C)worms attack
D)botnet process

Question 24

SSL primarily focuses on ____________________________    Pretty good privacy (PGP) is used in

A)integrity and authenticity
B)integrity and non- repudiation
C)authenticity and privacy
D)confidentiality and integrity