Knowledge check

The history and purpose of cryptography

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

Question 1 of 3

Which of the four core properties can a MAC (message authentication code) NOT provide, even though it authenticates a message?

Question 2 of 3

Who documented the first systematic method for breaking substitution ciphers, around 850 CE?

Question 3 of 3

What specific property did Shannon prove the one-time pad achieves, that AES, RSA, and ECC do not?

0 / 3 answered