Intermediate
Cybersecurity & Cryptography
Q41 / 100
What is AES and why is it the standard symmetric cipher?
Correct! Well done.
Incorrect.
The correct answer is A) Advanced Encryption Standard — chosen through open NIST competition, efficient in hardware and software, with 128/192/256-bit keys and no known practical attacks
A
Correct Answer
Advanced Encryption Standard — chosen through open NIST competition, efficient in hardware and software, with 128/192/256-bit keys and no known practical attacks
Explanation
AES (Rijndael, 2001 NIST standard) replaced DES. Block cipher with 128-bit blocks and 128/192/256-bit keys. Modes: CBC, CTR, GCM (AEAD). AES-NI hardware acceleration makes it fast on modern CPUs.
Progress
41/100