Imagine writing a secret note to a friend. If anyone reads it on the way, the secret is out. To protect it, you convert it into a scrambled, unreadable message (Ciphertext) using a secret code (Key).

D-Pad ↑ Current stage¹ Y Positive (+) Long press → continuous D-Pad ↓ Current stage¹ Y Negative (−) Short press → single step D-Pad ← Current stage¹ X Negative (−) ...