Deciphering a Short Papal Cipher from 1721

George Lasry, Paolo Bonavoglia, 2022. International Conference on Historical Cryptology.

Recovers most of the key and text of a 1721 letter from the papal nuncio in Brussels, written in comma-separated digit codes, which had been posed as a public challenge in 2019.

Voynich ManuscriptArticledoi: 10.3384/ecp188401Checked against the original0

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Cited in the methods survey on cryptanalysis.

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Lasry, G., & Bonavoglia, P. (2022). Deciphering a Short Papal Cipher from 1721. International Conference on Historical Cryptology. https://doi.org/10.3384/ecp188401

@article{lasry2022decipheringb,
  author = {Lasry, George and Bonavoglia, Paolo},
  title = {Deciphering a Short Papal Cipher from 1721},
  journal = {International Conference on Historical Cryptology},
  year = {2022},
  doi = {10.3384/ecp188401},
  url = {https://doi.org/10.3384/ecp188401}
}

TY  - JOUR
TI  - Deciphering a Short Papal Cipher from 1721
AU  - Lasry, George
AU  - Bonavoglia, Paolo
PY  - 2022
JO  - International Conference on Historical Cryptology
DO  - 10.3384/ecp188401
UR  - https://doi.org/10.3384/ecp188401
ER  -

Lasry, George and Paolo Bonavoglia. “Deciphering a Short Papal Cipher from 1721.” International Conference on Historical Cryptology (2022). https://doi.org/10.3384/ecp188401.