The four ciphers, three of which are unsolved, are the most alluring attribute of the Zodiac Killer among most with cryptoanalysis tendencies.
Unsolved. Known as the "Dripping Pen" cipher.
Unsolved. Known as the "My name is--" cipher.
Unsolved. Known as the "Button Letter" cipher.
- ↑ Oswell, Douglas E. The Unabomber and the Zodiac. 2007. Google Books. Web. 1 Nov. 2012.