encryption

What is the problem with the following plain text to encrypt with a Caesar Cipher?

Is your birthday 9/30/1998?

• Numbers cannot be encrypted

• It would be relatively easy to decipher after encryption

• Symbols cannot be encrypted

• all of the above

Which of the following best describes the need for using cryptography in data communications?

• Cryptography allows data to be sent over the internet.

• Cryptography ensures data is decipherable by the recipient, but not accessible by a third party.

• Cryptography prevents third parties from accessing personal accounts.

• Data is easier to access when it is encrypted.

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

What items are required to do a Substitution Cipher?

• Keyword

• Cipher text

• Key

• Number of alphabetical shifts

What is the world's most common password?  
(#1 on the Worst Passwords list)

• 123456
• letmein
• starwars
• house1

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?

• Vigenere Cipher
• Encryption
• Random Substitution cipher
• Decryption

What can be found in our browsers that keeps a record of our movements on the Internet?

• Hackers
• Virus
• Cookies
• Phishing scam

An encryption key is used to help decrypt messages

• True
• False

What is the definition of encryption?

• A method of making text unreadable to prevent unauthorised viewing.

• Programming code.

• Making data smaller.

• Producing a list of options for data input.