# Oranchak 2024: The Solution of the Zodiac Killer's 340-Character Cipher

> David Oranchak, Sam Blake, Jarl Van Eycke, 2024. 8 records on Mysteries Department cite it. The book models its annealing solver on this solution…

Source: https://mysteriesdept.com/sources/SRC08JJ5ZN87Z8V/the-solution-of-the-zodiac-killers-340-character-cipher  
Publisher: Mysteries Department  
Licence: CC BY 4.0 (credit Mysteries Department and link the page)  

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[Sources](https://mysteriesdept.com/sources)[Voynich Manuscript](https://mysteriesdept.com/mysteries/voynich-manuscript)Oranchak 2024

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# The Solution of the Zodiac Killer's 340-Character Cipher

David Oranchak, Sam Blake, Jarl Van Eycke, 2024.

The solvers' account of how the Zodiac killer's 340-character cipher was broken in 2020; the cipher combined homophonic substitution with a transposition.

**Voynich Manuscript** PreprintChecked against the original0

## What it's used for here

The book models its annealing solver on this solution, borrows its periodic bigram-repeat diagnostic for transposition, and cites the cycling of homophones in the Zodiac's 408-symbol cipher.

## Cited by on this site 8 records

[Reading Without a Key](https://mysteriesdept.com/sources/SRC0D8NJAWT22V4/reading-without-a-key)

The book, version 2.0

SRC

[7 methods surveys]

Cryptanalysis, mathematics, linguistics, mixed keys, frameworks of inquiry, inductive methods, encoding procedures

SRC

## Cite it

```
Oranchak, D., Blake, S., & Van Eycke, J. (2024). The Solution of the Zodiac Killer's 340-Character Cipher. https://arxiv.org/abs/2403.17350
```

[Read it free at arxiv.org](https://arxiv.org/abs/2403.17350)

Key

**SRC** 08JJ5ZN87Z8V

Kind

Preprint

Rights

arXiv-nonexclusive

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Against the published original

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[apollo](https://mysteriesdept.com/u/apollo)

The record

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