Mathematics of Symmetric Key Cryptography Quiz

What is encryption?

• Process of converting information into a physical form

• Process of converting information into a sound wave

• Process of converting information into a picture

• Process of converting information into a code

What is decryption?

• The process of converting encrypted data back into its original form

• The process of permanently deleting encrypted data

• The process of creating a new encryption key

• The process of converting data into encrypted form

What is the process of generating a key for encryption and decryption?

• Key generation

• Lock picking

• Code breaking

• Password guessing

How many keys are used in symmetric key cryptography for encryption and decryption?

• 1

• 5

• 10

• 3

What is a block cipher?

• A type of asymmetric key encryption algorithm

• A type of symmetric key encryption algorithm

• A type of public key encryption algorithm

• A type of hashing algorithm

How does a block cipher encrypt data?

• By converting the data into a different format

• By dividing the input into fixed-size blocks and applying mathematical operations using a secret key

• By compressing the data before encryption

• By using a public key to encrypt the data

What is the role of a key in block ciphers?

• It is used to generate random numbers for encryption

• It is used to control the encryption and decryption process.

• It is used to unlock the encrypted message

• It is used to compress the plaintext before encryption