Unit 4 - Encryption Practice Flashcard

Front

Rodrigo and Jancarlo are secret agents communicating in code. What type of cipher are they using if they encrypt their messages one byte at a time?

Back

A symmetric key cipher that encrypts plaintext one byte at a time

Front

In the world of cryptography, Sarah is on a mission to secure her secret messages. She decides to use a special type of cipher that encrypts her plaintext one block at a time. What type of cipher is Sarah using?

Back

A symmetric key cipher that encrypts plaintext one block at a time

Front

If a secret message can't be divided evenly into equal-sized blocks, what clever trick do they use to make it fit perfectly?

Back

Padding

Front

In the world of cryptography, Teddy and Leon are on a quest to uncover secrets! What magical tool do they need to transform a block cipher into a powerful encryption spell?

Back

An algorithm used with a block cipher to make an encryption algorithm

Front

What does ECB stand for in the cryptographic universe?

Back

Electronic Codebook

Front

What does CBC add on top of ECB to make it more secure?

Back

Randomization

Front

What does CBC use for the first plaintext block since it doesn't have a ciphertext block preceding it?

Back

Initial vector

Front

In a magical world of cryptography, Alexander and Sal are exploring different modes of operation. Which of the following is true about the mystical CTR mode?

Back

It is a block cipher acting like a stream cipher.

Front

GCM and GMAC are named after which famous mathematician?

Back

Galois

Front

What is steganography?

Back

The practice of hiding information in ways to prevent the detection of hidden messages.