Encryption and Cryptography Quiz

What is the primary purpose of encryption?

• To increase data redundancy

• To reduce data size

• To hide the original text of a message

• To speed up data transmission

Who is Caesar's Cipher named after?

• Nero

• Augustus Caesar

• Julius Caesar

• Marcus Aurelius

What is the main weakness of Caesar's Cipher?

• It only works with numbers

• It can be easily cracked by trying all possible keys

• It requires a computer to decrypt

• It is too complex for practical use

How many possible key solutions are there with a 10-digit key?

• 10 quadrillion

• 10 trillion

• 10 billion

• 10 million

What is the key length used in modern secure communications?

• 128-bit

• 512-bit

• 192-bit

• 256-bit

What is symmetric encryption?

• Encrypting data with a public key

• Using the same key for both encryption and decryption

• Using different keys for encryption and decryption

• Encrypting data without a key

What is the main advantage of using a longer key in encryption?

• It makes encryption faster

• It exponentially increases the number of guesses needed to crack the cipher

• It reduces the size of the encrypted message

• It makes decryption easier

Why is symmetric encryption not suitable for the open internet?

• It is too slow

• It requires a private meeting to agree on a key

• It is too expensive

• It is not secure enough

What is a public key used for in asymmetric encryption?

• Decrypting data

• Storing data

• Encrypting data

• Both encrypting and decrypting data

What is the role of a private key in asymmetric encryption?

• Storing data

• Encrypting data

• Decrypting data

• Both encrypting and decrypting data