Knowledge check

Stream ciphers & ChaCha20-Poly1305

3 questions testing what you just read — no login, no tracking, just immediate feedback.

Question 1 of 3

What operation does a stream cipher like ChaCha20 use to combine its keystream with the plaintext?

Question 2 of 3

Why doesn't ChaCha20 rely on table lookups the way some AES software implementations do?

Question 3 of 3

Paired with Poly1305, ChaCha20 becomes an AEAD construction functionally equivalent to which AES mode?

0 / 3 answered