Cryptography Quiz

Alec wants to send Becky an encrypted message using asymmetric encryption.

What does Alec encrypt the message with?

• Alec's private key

• Becky's private key

• Alec's public key

• Becky's public key

Stella sends Priscilla an encrypted message using asymmetric keys.

Which key is used to verify Stella's message?

• Stella's public key

• Priscilla's public key

• Stella's private key

• Priscilla's private key

Which block cipher mode converts the block cipher into a self-synchronizing stream cipher?

• CFB

• OFB

• EFB

• CTR

Which block cipher mode converts the block cipher to a synchronous stream output?

• CFB

• OFB

• ECB

• CTR

In asymmetric encryption, which key is used to encrypt the data?

• Private key

• Symmetric key

• Public key

• Session key

In which type of encryption is the same key used to encrypt and decrypt data?

• public

• asymmetric

• symmetric

• private

What alternative term can be used to describe asymmetric cryptographic algorithms?

• public key cryptography

• user key cryptography

• private key cryptography

• cipher-text cryptography

Which block cipher mode converts the block cipher into a stream cipher?

• CFB

• OFB

• ECB

• CTR

Which block cipher generates a counter value and a nonce?

• CFB

• CBC

• CTR

• OFB

Which block cipher mode produces the same ciphertext output every time the same plaintext is encrypted?

• CFB

• OFB

• CBC

• ECB