CIS 481-20: INTRO TO INFORM SECURITY CH8

• Question 1

  2 out of 2 points

  	The ____ algorithm was the first public key encryption algorithm developed (in 1977) and published for commercial use.
  	Selected Answer:   RSA Correct Answer:  RSA

• Question 2

  2 out of 2 points

  	____ is the process of converting an original message into a form that is unreadable to unauthorized individuals.
  	Selected Answer:   Encryption Correct Answer:  Encryption

• Question 3

  1 out of 1 points

  	The most popular modern version of steganography involves hiding information within files that appear to contain digital pictures or other images.
  	Selected Answer:  True Correct Answer:  True

• Question 4

  1 out of 1 points

  	Nonrepudiation means that customers or partners can be held accountable for transactions, such as online purchases, which they cannot later deny.
  	Selected Answer:  True Correct Answer:  True

• Question 5

  2 out of 2 points

  	____ are encrypted messages that can be mathematically proven to be authentic.
  	Selected Answer:   Digital signatures Correct Answer:  Digital signatures

• Question 6

  2 out of 2 points

  	____ is a hybrid cryptosystem originally designed in 1991 by Phil Zimmermann.
  	Selected Answer:   PGP Correct Answer:  PGP

• Question 7

  1 out of 1 points

  	Symmetric encryption uses two different but related keys, and either key can be used to encrypt or decrypt the message.
  	Selected Answer:  False Correct Answer:  False

• Question 8

  2 out of 2 points

  	____ is the information used in conjunction with an algorithm to create the ciphertext from the plaintext or derive the plaintext from the ciphertext.
  	Selected Answer:   Key Correct Answer:  Key

• Question 9

  1 out of 1 points

  	Hash algorithms are publicly known functions that create a value by converting variable-length messages into a single fixed-length value.
  	Selected Answer:  True Correct Answer:  True

• Question 10

  2 out of 2 points

  	____ attacks are a collection of brute-force methods that attempt to deduce statistical relationships between the structure of the unknown key and the ciphertext that is the output of the cryptosystem.
  	Selected Answer:   Correlation Correct Answer:  Correlation

• Question 11

  2 out of 2 points

  	Substitution ciphers that use two or more alphabets, and are referred to as ____ substitutions.
  	Selected Answer:   polyalphabetic Correct Answer:  polyalphabetic

• Question 12

  2 out of 2 points

  	____ is an integrated system of software, encryption methodologies, protocols, legal agreements, and third-party services that enables users to communicate securely.
  	Selected Answer:   PKI Correct Answer:  PKI

• Question 13

  2 out of 2 points

  	____ functions are mathematical algorithms that generate a message summary or digest to confirm the identity of a specific message and to confirm that there have not been any changes to the content.
  	Selected Answer:   Hash Correct Answer:  Hash

• Question 14

  2 out of 2 points

  	A method of encryption that requires the same secret key to encipher and decipher the message is known as ____ encryption.
  	Selected Answer:   symmetric Correct Answer:  symmetric

• Question 15

  1 out of 1 points

  	When an asymmetric cryptographic process uses the sender’s private key to encrypt a message, the sender’s public key must be used to decrypt the message.
  	Selected Answer:  True Correct Answer:  True