Question 1

Which algorithm was U. S. Patent 5,231,668, filed on july 26, 1991, attributed to David W. Kravitz, and adopted by the U. S. government in 1993 with FIPS 186?

Options :

A : DSA

B : RSA

C : AES

D : RC4

Answer: A

Question 2

Cryptographic hashes are often used for message integrity and password storage. It is important to understand the common properties of all cryptographic hashes. What is not true about a hash?

Options :

A : Few collisions

B :

Variable length input

C : Reversible

D : Fixed length output

Answer: C

Question 3

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 4

Which one of the following is a component of the PKI?

Options :

A :

CA

B : TGS

C : TGT

D : OCSP

Answer: A

Question 5

Collision resistance is an important property for any hashing algorithm. Joan wants to find a cryptographic hash that has strong collision resistance. Which one of the following is the most collisionresistant?

Options :

A : MD4

B : PIKE

C : SHA2

D : MD5

Answer: C

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