Paper 2009/166

I shall love you up to the death

Valerie Nachef and Jacques Patarin


\begin{abstract} In this paper, we explain the encryption algorithm used by the Queen of France, Marie-Antoinette, to send letters to Axel von Fersen during the French Revolution. We give the complete deciphering of some letters for which we found differences with the text taken from historical books. We also provide the deciphering of one letter that seems to be unknown so far. The results we get bring new proofs on Marie-Antoinette's deep affection for Fersen. Finally, we mention some open questions about Marie-Antoinette's correspondence with Axel von Fersen.

Available format(s)
Secret-key cryptography
Publication info
Published elsewhere. Unknown where it was published
Contact author(s)
valerie nachef @ u-cergy fr
2009-08-18: last of 2 revisions
2009-04-10: received
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      author = {Valerie Nachef and Jacques Patarin},
      title = {I shall love you up to the death},
      howpublished = {Cryptology ePrint Archive, Paper 2009/166},
      year = {2009},
      note = {\url{}},
      url = {}
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