# Costamagna 1977: Un'ottima applicazione quattrocentesca del sistema cifrante monoalfabetico

> Giorgio Costamagna, 1977. 2 records on Mysteries Department cite it. The book uses it for how secretaries chose among homophones, noting that the…

Source: https://mysteriesdept.com/sources/SRC08JJA3G053MJ/unottima-applicazione-quattrocentesca-del-sistema-cifrante  
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)Costamagna 1977

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# Un'ottima applicazione quattrocentesca del sistema cifrante monoalfabetico

Giorgio Costamagna, 1977. _Studi di Storia Medioevale e Diplomatica_ 2: 353–358.

Giorgio Costamagna's study of a Milanese cipher letter of 1453, read against its surviving key, showing how a chancery secretary used a monoalphabetic system with variant signs.

**Voynich Manuscript** ArticleChecked against the original0

## What it's used for here

The book uses it for how secretaries chose among homophones, noting that the Milanese writer never used the same sign twice in a row.

## Cited by on this site 2 records

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

The book, version 2.0

SRC

[1 methods surveys]

Mixed keys

SRC

## Cite it

```
Costamagna, G. (1977). Un'ottima applicazione quattrocentesca del sistema cifrante monoalfabetico. Studi di Storia Medioevale e Diplomatica, 2, 353–358.
```

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Key

**SRC** 08JJA3G053MJ

Kind

Journal article

Rights

CC-BY-SA-4.0

Checked

Against the published article

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The record

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