Encryption

Which of these is the most secure way of data transfer?

• HTTP
• HTTPS

What does this padlock sign mean in the address bar of your browser?

• The site is secure and data is transmitted using SSL

• There is a padlock available for purchase

• The website does not include "safety locks"

• The page is locked down for some odd reason

What type of key is not shared and computers cannot decrypt a message without it?

• Free key
• Private key
• Public key
• Personal key

If the same key is used to encrypt and decrypt a message, this is known as? 

• Symmetric encryption
• Encryption doesn't exist!
• Asymmetric encryption
• Same-key encryption

What does SSL stand for?

• Secure Socket Layer

• Secret Secure Layer

Encryption is a way of 

• Securing Information on a network
• Securing Viruses
• Deleting applications
• Hacking Passwords

Taking a secret message and reproducing the original plain text is known as?

• Caesar Cipher

• Encryption

• Cipher Text

• Decryption

Asymmetric encryption uses only 1 key.

• True

• False

• Maybe

• God Knows

hello has been encrypted with Caesar cipher to khoor. The key used was:

• abc
• 3
• 2
• alphabet mapping table

Consider the process of encoding and decoding a message using the following Caesar cipher encoding scheme in which the plaintext and ciphertext alphabets are offset by four positions, as shown below:

^{Plaintext: a b c d e f g h i j k l m n o p q r s t u v w x y z}

^{Ciphertext: w x y z a b c d e f g h i j k l m n o p q r s t u v}

Which of the following encoded ciphertext strings decodes to an original plaintext message of "secret"?

• etsecr

• wigvix

• kwujwl

• oaynap