Question 1

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 2

A _____ is a function is not reversible.

Options :

A : Block Cipher

B : Stream cipher

C : Hash

D : Asymmetric cipher

Answer: C

Question 3

Which of the following areas is considered a strength of symmetric key cryptography when compared with asymmetric algorithms?

Options :

A : Speed

B : Key distribution

C : Security

D : Scalability

Answer: A

Question 4

Which of the following algorithms uses three different keys to encrypt the plain text?

Options :

A : 3DES

B : Skipjack

C : Blowfish

D : AES

Answer: A

Question 5

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

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