# Aldarrab 2022: Segmenting Numerical Substitution Ciphers

> Nada Aldarrab, Jonathan May, 2022. 4 records on Mysteries Department cite it. The book applies its unigram segmentation to Voynichese in the chapter on…

Source: https://mysteriesdept.com/sources/SRC08JJDRP052CH/segmenting-numerical-substitution-ciphers  
Publisher: Mysteries Department  
Licence: CC BY 4.0 (credit Mysteries Department and link the page)  

---

[Sources](https://mysteriesdept.com/sources)[Voynich Manuscript](https://mysteriesdept.com/mysteries/voynich-manuscript)Aldarrab 2022

**0**

# Segmenting Numerical Substitution Ciphers

Nada Aldarrab, Jonathan May, 2022.

Offers the first automatic methods for splitting unspaced numerical ciphers into their cipher units, using byte-pair encoding and unigram language models, and a lattice method for reading ciphers whose keys allow more than one value per sign. With it the authors fully solved a real historical cipher, the IA cipher.

**Voynich Manuscript** Articledoi: **[10.18653/v1/2022.emnlp-main.44](https://doi.org/10.18653/v1/2022.emnlp-main.44)** Checked against the original0

## What it's used for here

The book applies its unigram segmentation to Voynichese in the chapter on looking for the key, and the cryptanalysis survey takes it as the model for a joint segmentation-and-substitution test.

## Cited by on this site 4 records

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

The book, version 2.0

SRC

[3 methods surveys]

Cryptanalysis, mixed keys, inductive methods

SRC

## Cite it

```
Aldarrab, N., & May, J. (2022). Segmenting Numerical Substitution Ciphers. https://doi.org/10.18653/v1/2022.emnlp-main.44
```

[Read it free at doi.org](https://doi.org/10.18653/v1/2022.emnlp-main.44)[PDF stored here · 9 pages](https://mysteriesdept.com/sources/SRC08JJDRP052CH/segmenting-numerical-substitution-ciphers/pdf)

The PDF is the copy doi.org gives away, kept here so the link can't break. Downloads are open to beta members.

Key

**SRC** 08JJDRP052CH

Kind

Journal article

Rights

CC-BY-4.0

Checked

Against the published article

Added by

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

The record

Bibliographic records are CC0. Take this one as CSL-JSON, BibTeX or RIS.

[CSL-JSON](https://mysteriesdept.com/sources/SRC08JJDRP052CH/segmenting-numerical-substitution-ciphers/csl.json)