Z-340 cipher
E1126876
UNEXPLORED
The Z-340 cipher is a famously unsolved (and later partially cracked) cryptogram sent by the Zodiac Killer in 1969, long regarded as one of the most challenging and enigmatic ciphers in true-crime history.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Z-340 cipher canonical | 1 |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.