Question 1

In a Feistel cipher, the two halves of the block are swapped in each round. What does this provide?

Options :

A : Avalanche

B : Confusion

C : Substitution

D : Diffusion

Answer: B

Question 2

Fred is using an operating system that stores all passwords as an MD5 hash. What size is an MD5 message digest (hash)?

Options :

A : 256

B : 512

C : 160

D : 128

Answer: D

Question 3

A _________ is a digital representation of information that identifies you as a relevant entity by a trusted third party.

Options :

A : Ownership stamp

B : Digest

C : Hash

D : Digital Signature

Answer: D

Question 4

Which of the following asymmetric algorithms is described by U.S. Patent 5,231,668 and FIPS 186

Options :

A : RSA

B : RC4

C : DSA

D : AES

Answer: C

Question 5

Which of the following is an asymmetric algorithm that was first publically described in 1977?

Options :

A : RSA

B : Twofish

C : Elliptic Curve

D : DESX

Answer: A