Question 1

Which of the following are valid key sizes for AES (choose three)?

Options :

A : 256

B : 512

C : 192

D : 56

E : 128

F : 64

Answer: A,C

Question 2

Which one of the following terms describes two numbers that have no common factors?

Options :

A : Fermat-s number

B : Convergent

C : Coprime

D : Euler-s totient

Answer: C

Question 3

Part of understanding cryptography is understanding the cryptographic primitives that go into any crypto system. A(n) _______ is a fixed-size input to a cryptographic primitive that is random or pseudorandom.

Options :

A : IV

B : Key

C : Salt

D : Chain

Answer: B

Question 4

Which of the following is a cryptographic protocol that allows two parties to establish a shared key over an insecure channel?

Options :

A : RSA

B : Diffie-Hellman

C : Elliptic Curve

D : MD5

Answer: B

Question 5

Which one of the following is an authentication method that sends the username and password in cleartext?

Options :

A :

Kerberos

B : PAP

C : CHAP

D : SPAP

Answer: B