WINNIPEG, MANITOBA (CTV Network) — Coded messages found in the folds of a Victorian-era dress were finally cracked by a University of Manitoba researcher almost a decade after they were discovered.

1. Introduction -- 2. From Julius Caesar to simple substitution -- 3. Polyalphabetic systems -- 4. Jigsaw ciphers -- 5. Two-letter ciphers -- 6. Codes -- 7. Ciphers for spies -- 8. Producing random ...