rail fence cipher

It appears to have been a transposition tool that produced something much like the Rail fence cipher and resembled a chess board.

The rail fence cipher is not very strong; the number of practical keys is small enough that a cryptanalyst can try them all by hand.

Calvin discovers a diary in the library, encrypted with a Rail Fence Cipher.

The term Zigzag cipher may refer to the Rail Fence Cipher as described above.

The Rail Fence cipher is a form of transposition cipher that gets its name from the way in which it is encoded.

In the rail fence cipher, the plaintext is written downwards on successive "rails" of an imaginary fence, then moving up when we get to the bottom.

Transposition cipher: the ciphertext is a permutation of the plaintext (Rail fence cipher)

"Rail Fence Cipher" (also called a zigzag cipher) generally refers to a form of transposition cipher.