Question 1

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 2

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 3

A _____ is a function is not reversible.

Options :

A : Block Cipher

B : Stream cipher

C : Hash

D : Asymmetric cipher

Answer: C

Question 4

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 5

Denis is looking at an older system that uses DES encryption. A colleague has told him that DES is insecure due to a small key size. What is the key length used for DES?

Options :

A :

64

B : 128

C : 56

D : 256

Answer: C

Free ECES Mock Exam – Practice Online Confidently

Buying Options: