The CipherForge cast
Each friend shows you one idea by how they act. Meet them all and see how the ideas fit together.
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Caesar Caesar shift / monoalphabetic shift cipher -
Mask Atbash + general monoalphabetic substitution (every letter has a fixed substitute) -
Vigenère Vigenère / polyalphabetic keyword cipher (the Caesar-on-a-rotating-keyword pattern) -
Echo Pair Playfair digraph cipher (letters encoded in pairs through a 5×5 grid) -
Rail Rail-fence + columnar transposition ciphers (rearrange letter order without changing the letters themselves) -
Tally Number-based codes (A1Z26, ASCII, binary, book ciphers — any mapping that converts letters to numbers) -
Sift Frequency analysis + cryptanalysis-by-statistics (the cipher-breaking method, not a cipher itself) -
Lattice Modern cryptography fundamentals — XOR, public-key concept, hashing (the irreversible / asymmetric family) -
Hollow Hides a secret message inside something ordinary, so nobody even knows there is a message to look for. -
Tome Keeps a shared code-book where whole words stand for secret words, so only someone with the same book can read the note.