Cryptography Quiz

What is the Caesar cipher?

• A type of symmetric key cipher

• A type of substitution cipher

• A type of transposition cipher

• A type of public key cipher

Explain the process of encrypting a message using the Caesar cipher.

• The message is converted to binary code

• Each letter in the message is shifted by a certain number of positions in the alphabet.

• The message is encrypted using a special key

• The message is rearranged in reverse order

What is the key in a Caesar cipher?

• The color of the cipher

• The number of characters in the message

• The type of encryption used

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

How can the Caesar cipher be decrypted?

• By using a different encryption algorithm

• By shifting the letters in the opposite direction of the original shift used for encryption

• By rearranging the letters in the encrypted message

• By adding a random key to the encrypted message

What is the Vigenère cipher?

• A type of ancient writing system

• A method of encrypting alphabetic text using polyalphabetic substitution

• A method of encrypting numeric text using a single alphabet substitution

• A type of computer virus

How does the Vigenère cipher differ from the Caesar cipher?

• The Vigenère cipher uses a different alphabet for encryption.

• The Vigenère cipher does not involve any shifting of letters.

• The Vigenère cipher uses a keyword to shift each letter by a different amount.

• The Vigenère cipher uses a fixed shift for all letters.

Explain the concept of keyword in the Vigenère cipher.

• Keyword determines the shift value for each letter in the plaintext.

• Keyword determines the font style of the plaintext.

• Keyword determines the punctuation used in the ciphertext.

• Keyword determines the color of the cipher text.

What is the significance of the Vigenère square in the Vigenère cipher?

• It is used to find the encryption key for each letter in the plaintext.

• It is used to decrypt the ciphertext

• It is used to generate the plaintext

• It is used to calculate the frequency of letters in the plaintext

What is a substitution cipher?

• A method of encryption using number substitution

• A method of encryption using image substitution

• A method of encryption using sound substitution

• A method of encryption using letter substitution

How does a substitution cipher work?

• Each letter in the plaintext is replaced with a number

• The plaintext is encrypted using a complex algorithm

• Each letter in the plaintext is replaced with a different letter according to a set of rules or key.

• The letters in the plaintext are rearranged in alphabetical order