Nonsecret codes
book code
dictionary code
Codetalking
Pig Latin
Turkish Irish
Caesar cipher
St. Cyr slide
Keyboard cipher
Morse code
Semaphore
Pigpen cipher
Rosicrucian cipher
Date shift cipher
Greek square cipher
Greek skytale
Rail fence cipher
Route transposition cipher
Codebreaking
Early concealment techniques
Null cipher
Cardano grille
Word grille
Space code
Playing card code
Dot cipher
Line cipher
Zigzag cipher
Invisible inks.
OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
Top secret : a handbook of codes, ciphers, and secret writing by Paul B. Janeczko. ISBN 0763609714. Published by Candlewick Press in 2004. Publication and catalogue information, links to buy online and reader comments.
