Encryption Quiz 3

What is encryption?

• A process of decoding messages

• A process of encoding messages to keep them secret

• A technique used only in military communications

• A method to increase the speed of data transfer

What does decryption involve?

• Creating a new encryption method

• Reversing encryption to reveal the original plaintext

• Increasing the complexity of encryption

• Sharing encrypted messages publicly

What is a cipher?

• A message sent in secret

• A tool to perform decryption

• A technique that performs encryption

• A code used by spies

How does the Caesar Cipher encrypt messages?

• By reversing the order of letters

• By shifting each letter by a fixed number of positions in the alphabet

• By replacing each letter with a number

• By using a secret decoder ring

What is meant by 'cracking encryption'?

• Officially decoding a message with authorization

• Attempting to decode a secret message without knowing the specifics of the cipher

• A legal way to decrypt messages

• A method to strengthen the encryption

What is plaintext in the context of encryption?

• The encrypted message

• The original message before encryption

• The message after decryption

• A random substitution of letters

What is a 'shift' in the context of the Caesar Cipher?

• A random number used to encode a message

• The number of positions each letter is moved in the alphabet

• The process of changing the encryption technique

• A tool used to encrypt messages

Which letter would "A" turn into if the shift is 3 in a Caesar Cipher?

• C

• B

• D

• E

What is a key advantage of the Random Substitution Cipher over the Caesar Cipher?

• It is easier to use

• It requires no key for decryption

• It offers a higher level of security due to random substitutions

• It is faster

What is a major disadvantage of the Random Substitution Cipher?

• It offers lower security

• It requires a decryption key which makes communication less convenient

• It can only encrypt alphabetic characters

• It is too simple and easy to crack