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 |
How this entity was disambiguated
This entity first appeared as the object of triple T14877503 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Z-340 cipher Context triple: [Zodiac Killer, notableCipher, Z-340 cipher]
-
A.
Z-408 cipher
The Z-408 cipher is the first and most famous cryptogram sent by the Zodiac Killer, partially solved in 1969 and known for revealing a taunting message from the unidentified serial murderer.
-
B.
Z-13 cipher
The Z-13 cipher is one of the Zodiac Killer’s shortest and most infamous unsolved cryptograms, consisting of just 13 characters that have fueled decades of speculation about its hidden message.
-
C.
Lorenz cipher
The Lorenz cipher was a high-level German teleprinter encryption system used during World War II, whose interception and decryption by the Allies led to the development of the Colossus computers.
-
D.
Enigma
Enigma is a science fiction novel by Michael Kube-McDowell that explores complex themes of human identity, communication, and first contact.
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E.
Enigma
Enigma is a 2001 British World War II thriller film about codebreakers at Bletchley Park working to crack Nazi naval ciphers.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Z-340 cipher Target entity description: 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.
-
A.
Z-408 cipher
The Z-408 cipher is the first and most famous cryptogram sent by the Zodiac Killer, partially solved in 1969 and known for revealing a taunting message from the unidentified serial murderer.
-
B.
Z-13 cipher
The Z-13 cipher is one of the Zodiac Killer’s shortest and most infamous unsolved cryptograms, consisting of just 13 characters that have fueled decades of speculation about its hidden message.
-
C.
Lorenz cipher
The Lorenz cipher was a high-level German teleprinter encryption system used during World War II, whose interception and decryption by the Allies led to the development of the Colossus computers.
-
D.
Enigma
Enigma is a 1982 Cold War spy thriller film involving codebreaking and espionage, directed by Jeannot Szwarc.
-
E.
Enigma
Enigma is a science fiction novel by Michael Kube-McDowell that explores complex themes of human identity, communication, and first contact.
- F. None of above. chosen
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.