Topic 5 - Encryption

Question 1

Encryption is used to make stored data more ______ from hackers, by making it ______ to people who do not have the ______ to decrypt or decode it. This method is commonly used to protect data transmitted over the ______.

Answer 1

Encryption is used to make stored data more secure from hackers, by making it unreadable to people who do not have the key to decrypt or decode it. This method is commonly used to protect data transmitted over the internet.

Question 2

Encryption operates by modifying plain text using an encryption ______; this takes place by using an encryption ______ which stipulates how the message will be ______. An ______ user is able to ______ this message by using a ______ decryption key based on a decryption ______.

Answer 2

Encryption operates by modifying plain text using an encryption algorithm; this takes place by using an encryption key which stipulates how the message will be encoded. An authorised user is able to decode this message by using a secret decryption key based on a decryption algorithm

Question 3

What is another name for the Vernam Cipher?

Answer 3

One-time pad cipher

Question 4

The Vernam cipher is a ______ data ______ cipher that is combined with a s__e length ______ stream of data to create the ______ , based on boolean exclusive ______ function.

Answer 4

The Vernam cipher is a digital data stream cipher that is combined with a same length random stream of data to create the ciphertext, based on boolean exclusive OR function.