MOD 12 QUIZ - PKI and Cryptographic Applications

Question 1

In public key cryptosystems, each user has how many keys?

Answer 1

Two

Question 2

A digital signature is a(n) _________________.

Answer 2

encrypted message digest

Question 3

To verify a signature, what must be done?

Answer 3

decrypt using public key and generate a digest

Question 4

What does FIPS stand for?

Answer 4

Federal Information Processing Standard

Question 5

What does PKI stand for?

Answer 5

Public Key Infrastructure

Question 6

What conditions must a hash function satisfy?

Answer 6

Easy to compute
Collision resistant
One-way

Question 7

What are the steps involved in Certificates?

Question 8

What are Certificate Authorities?

Answer 8

Neutral organizations that offer notarization services for digital certificates

Question 9

Is MD2 a secure hashing algorithm?

Question 10

What does TOR allow?

Answer 10

Anonymous hosting
Anonymous browsing

Question 11

What is Quantum Supremacy?

Answer 11

The ability for quantum computers to solve hard problems

Question 12

RSA depends on what for security?

Answer 12

Computational difficulty

Question 13

HMAC guarantees what?

Answer 13

Integrity

Question 14

How large is the message digest for a SHA-256 hash?

Answer 14

256 bits

Question 15

When digitally signing a document a ________ is _____________ using a __________

Question 16

What is Analytic Attack?

Question 17

What is Implementation Attack?

Question 18

What is a Brute Force Attack?

Question 18

What is a Side-Channel Attack?

Question 19

What is a Timing Attack?

Question 20

What block size is used by SHA-512?

Answer 20

1024 bit

Question 21

What does SHA stand for?

Answer 21

Secure Hash Algorithm

Question 22

An RSA key of 3072 is equivalent to which other keys?

Question 23

A Hash function takes in __________ bits and outputs __________ bits

Answer 23

variable
fixed length

Question 24

What are the goals for digital signature systems

Answer 24

That a message came from the claimed sender That the message was not altered

Question 25

What provides assurance that the people they are communicating with truly are who they claim to be?

Answer 25

Certificates

Question 26

Asymmetric key cryptography uses what kinds of key(s)?

Answer 26

Public and Private keys

Question 27

What is the hash-value length of a RIPEMD-256 hash?

Answer 27

256 bits

Question 28

What is Steganography?

Answer 28

Hiding messages in other messages