Question 1

Juanita has been assigned the task of selecting email encryption for the staff of the insurance company she works for. The various employees often use diverse email clients. Which of the following methods is available as an add-in for most email clients?

Options :

A : PGP

B : Caesar cipher

C : DES

D : RSA

Answer: A

Question 2

Which one of the following best describes a process that splits the block of plaintext into two separate blocks, then applies the round function to one half, and finally swaps the two halves?

Options :

A : Symmetric cryptography

B : Block ciphers

C : Substitution cipher

D : Feistel cipher

Answer: D

Question 3

Which of the following techniques is used (other than brute force) to attempt to derive a key?

Options :

A : Cryptoanalysis

B : Hacking

C : Cryptography

D : Password cracking

Answer: A

Question 4

What must occur in order for a cipher to be considered ‘broken’?

Options :

A : Decoding the key

B : Rendering the cipher no longer useable

C : Rendering the cipher no longer useable

D : Uncovering the algorithm used

Answer: C

Question 5

How can rainbow tables be defeated?

Options :

A : Use of non-dictionary words

B : Lockout accounts under brute force password cracking attempts

C : All uppercase character passwords

D : Password salting

Answer: D

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