Knowledge check

Key sizes & security levels: what the numbers mean

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

Question 1 of 10

Why does RSA need a much larger key than ECC to reach the same security level?

Question 2 of 10

Roughly what ECC key size reaches the same ~128-bit security level as 3072-bit RSA?

Question 3 of 10

Why does AES's key size equal its security level, while RSA's key size doesn't equal its security level?

Question 4 of 10

What does "128-bit security" mean, precisely?

Question 5 of 10

According to NIST SP 800-57's rough equivalence table, what classical security level does 2048-bit RSA correspond to?

Question 6 of 10

What ECC key size roughly matches 112-bit classical security, alongside 2048-bit RSA?

Question 7 of 10

Why does the classical RSA/ECC key-size equivalence table become irrelevant against a sufficiently large quantum computer?

Question 8 of 10

What quantum algorithm affects AES and SHA-2, and how severely compared to Shor's effect on RSA/ECC?

Question 9 of 10

Why is the 80-bit classical security level now considered deprecated?

Question 10 of 10

Which set of key sizes together reach the "128-bit, current baseline" security level, per the equivalence table?

0 / 10 answered