Codes, Ciphers and Secret Writing Quotes

“The Rail Fence Cipher Suppose”
― Martin Gardner, Codes, Ciphers and Secret Writing

“[7] The Shadows Code In the 1930’s a mysterious crime-fighter called the Shadow was the hero of a popular pulp magazine and an even more popular radio show. Dressed all in black, the Shadow could glide unseen through the darkness to battle the forces of evil. Stories about the Shadow, written by Maxwell Grant (pseudonym for the Shadow’s creator, Walter B. Gibson), often contained curious codes. This cipher, from a novelette called The Chain of Death, is one of the best.”
― Martin Gardner, Codes, Ciphers and Secret Writing

“The Polybius Checkerboard Polybius was an ancient Greek writer who first proposed a method of substituting different two-digit numbers for each letter. The alphabet is written inside a 5–by–5 square matrix which has numbered rows and columns:”
― Martin Gardner, Codes, Ciphers and Secret Writing

“LEWIS CARROLL’S CIPHER”
― Martin Gardner, Codes, Ciphers and Secret Writing