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What it is:
AES encryption transforms plaintext into ciphertext using a shared secret key. Why it’s important:
  • AES is extremely fast compared to asymmetric methods
  • AES is suitable for large data (text blocks, files, streams)
Key sizes (typical):
  • 128-bit, 192-bit, 256-bit (larger keys increase brute-force resistance)
Try it (demo):
  1. Enter a longer plaintext (example: a full paragraph)
  2. Choose/enter a secret key (use a demo key for assignment)
  3. Encrypt
  4. Save the ciphertext output
Link: https://diveshfx.github.io/online-tools/aes/encrypt/ or http://tiny.cc/aesencryption