# von zur Gathen 2023: Unicity distance of the Zodiac-340 cipher

> Joachim von zur Gathen, 2023. 4 records on Mysteries Department cite it. The quantitative argument that the 2020 decryption is unique.

Source: https://mysteriesdept.com/sources/SRC0D71P6CE73Y3/unicity-distance-of-the-zodiac-340-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)[Zodiac ciphers](https://mysteriesdept.com/mysteries/zodiac-ciphers)von zur Gathen 2023

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# Unicity distance of the Zodiac-340 cipher

Joachim von zur Gathen, 2023. _Cryptologia 47(5): 474-488_.

Estimates the unicity distance of Z340's full system (homophonic substitution, sectioning, transposition, irregular substitutions) at no more than 152 characters under three models of the plaintext language.

**Zodiac ciphers** Articledoi: **[10.1080/01611194.2023.2174821](https://doi.org/10.1080/01611194.2023.2174821)** Checked against the original0

## What it's used for here

The quantitative argument that the 2020 decryption is unique.

## Cited by on this site 4 records

[The unicity distance of the full system is at most 152 characters, well below 340.](https://mysteriesdept.com/mysteries/zodiac-ciphers/evidence/EVD0D71PG4Y1RJP/the-unicity-distance-of-the-full-system-is-at-most-152)

Evidence

EVD

[Von zur Gathen publishes the unicity distance of the Z340 system](https://mysteriesdept.com/mysteries/zodiac-ciphers/events/EVT0D71PDPT0C02/von-zur-gathen-publishes-the-unicity-distance-of-the-z340)

EVT

[The Zodiac ciphers](https://mysteriesdept.com/mysteries/zodiac-ciphers)

The mystery article

MYS

[Is the 2020 decryption of Z340 the true message?](https://mysteriesdept.com/mysteries/zodiac-ciphers/questions/QST0D71PE6E3RE4/is-the-2020-decryption-of-z340-the-true-message)

Question

QST

## Cite it

```
von zur Gathen, J. (2023). Unicity distance of the Zodiac-340 cipher. Cryptologia 47(5): 474-488. https://doi.org/10.1080/01611194.2023.2174821
```

[Find it at doi.org](https://doi.org/10.1080/01611194.2023.2174821)

Key

**SRC** 0D71P6CE73Y3

Kind

Journal article

Rights

The publisher's

Checked

Against the published article

Added by

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

The record

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