CodeHS Cryptopgraphy Unit 2

Front

Using the Caesar cipher, 'HELLO' is encrypted to 'OLSSV' with a shift of 7. The message 'HELLO' is the __________.

Back

plaintext

Front

Term in cryptography for using the same key to encrypt and decrypt data.

Back

Symmetric Encryption

Front

Marsha found her sister’s diary with passwords that didn't work. She tallied letter appearances to decrypt them. What code-breaking method did she use?

Back

Letter frequency analysis

Front

Rail Fence Cipher uses columns, writing downwards and starting a new column at the bottom. This technique is an example of:

Back

transposition.

Front

Diffie-Hellman Key Exchange vulnerability: _

Back

authentication

Front

Largest disadvantage of symmetric encryption?

Back

Difficult to securely transmit the secret key.

Front

Asymmetric encryption: Allie sends a message to Nicholas using:

Back

Nicholas’s public key

Front

Asymmetric encryption: Nicholas uses ______ to open Allie's message.

Back

His private key

Front

Term for an encrypted message.

Back

ciphertext

Front

In the Caesar cipher, 'HELLO' becomes 'OLSSV' with a shift of 7. The number 7 is the __________.

Back

key