Cryptography Quiz V1

What is the purpose of using ciphers in cryptography?

• To create encoded messages that can be sent without fear of unintended recipients reading them

• To make data transmission slower and more secure

• To compress data so that it takes up less space

• To convert plaintext into a non-encrypted format

What is the term used for converting plaintext into ciphertext?

• Decryption

• Encoding

• Encryption

• Ciphering

What is the main goal of cryptography?

• To ensure that only the intended recipients have the tools to decode an encrypted message

• To create complex algorithms that cannot be solved

• To increase the size of the data being transmitted

• To display patterns in data for easier analysis

What does decryption do in cryptography?

• It encrypts the message further to enhance security

• It compresses the encrypted message to save space

• It converts ciphertext back into plaintext

• It creates a new pattern for encrypting messages

Who was known to use the Caesar Cipher around the year 60 BC?

• A) A Greek philosopher

• B) A Roman politician and military general

• C) An Egyptian pharaoh

• D) A medieval king

What is the Caesar Cipher?

• A) A code used by Julius Caesar for personal communication

• B) An encryption method that shifts letters by a fixed number down the alphabet

• C) A formula for calculating the area of the Roman Empire

• D) A secret language of the Roman army

How does the Caesar Cipher encrypt a message?

• A) By reversing the order of the letters in the message

• B) By replacing each letter with the corresponding symbol from a different alphabet

• C) By replacing each letter with a letter that is a fixed number of positions down the alphabet

• D) By using a special ring with symbols to encode messages

What is the shift value that Caesar is believed to have used for his cipher?

• 1

• 2

• 3

• 4

According to the Caesar cipher, what letter does A become after applying a shift of 3?

• D

• C

• B

• E

What is the mathematical function for the Caesar cipher?

• y = x - n

• y = x + n

• y = x / n

• y = x * n