Knowledge check

Hash functions & digital signatures

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

Question 1 of 3

What causes a length-extension attack against SHA-2?

Question 2 of 3

Why does HMAC resist length-extension attacks that naive H(key‖message) doesn't?

Question 3 of 3

Why is SHA-256 described as offering ~128-bit, not 256-bit, collision resistance?

0 / 3 answered