Solve the fourth puzzle, and the path will unfold to your next prize. Remember, hidden within the code lies a secret “bacon” — a clever pattern of A’s and B’s waiting to be cracked.

Riddle (Hint for the Word):

I'm not built of brick or stone,
Yet I guard your digital throne.
I filter traffic, block the unknown—
Silent, unseen, but never alone.
What am I?

Initial Clue (The Word - Encoded):