Editing Symmetric Crypto (section)

== <span style="color: #FFFFFF;">Analyzing</span> ==
{| class="wikitable"
|+ AES-128 vs. AES-256
! Feature !! AES-128 !! AES-256
|-
| Key Length || 128 bits || 256 bits
|-
| Rounds of Scrambling || 10 Rounds || 14 Rounds
|-
| Speed || Faster (uses less battery) || Slower
|-
| Security Level || 'Secret' (Unbreakable by current computers) || 'Top Secret' (Quantum-resistant)
|}

'''The Concept of "Cipher Block Chaining" (CBC)''': If you encrypt a large file where every block is identical (like a white image), a simple cipher will produce identical blocks of ciphertext. A spy could "see" the shape of the image even without the key. Analyzing the '''Modes of Operation''' (like adding the previous block's "noise" to the next one) is essential to ensure that the ciphertext looks like pure random noise.
</div>

<div style="background-color: #483D8B; color: #FFFFFF; padding: 20px; border-radius: 8px; margin-bottom: 15px;">