Which cipher exchanges letters for symbols contained within grid fragments?

• A. Pigpen Cipher
• B. Caesar Cipher
• C. Font Code (Steganography)
• D. One Time Pad

Answer: (A)

This question is testing a grid-based substitution idea. The Pigpen cipher replaces each letter with a symbol drawn from the fragments of two 3-by-3 grids and two X-shaped grids. Each letter corresponds to a specific segment of those grid shapes, so you see shapes like corners, lines, or intersections instead of letters. A dot inside a symbol differentiates letters that share the same grid fragment, adding a second layer of distinction. This contrasts with methods like a Caesar cipher, which simply shifts letters in the alphabet, or steganography approaches that hide messages in fonts or images, or a one-time pad that mixes plaintext with a random key without using grid-derived symbols.