Cipher Challenge
The Papal Nuncio's Brussels Letter
A papal nuncio in Brussels sent this coded letter to Rome on 9 October 1721. The manuscript mixes mostly two-digit groups with nulls and a few four-digit nomenclature entries. Transcription and cryptanalysis, CC BY 4.0
Source & status
- Origin
- Historical cipher
- Solution
- Partial
Ciphertext
01 16 05 14 6 1 58 06 14 77 2 03 61 45 9441 43 03 04 53 06 17 66 71 38 2 67 14 77 03 38 53 38 77 22 05 04 14 40 18 77 15 35 58 16 38 77 53 9336 9485 53 03 16 06 14 66 77 17 38 16 05 14 77 222 15 77 73 2 73 77 41 04 53 58 61 15 16 66 17 77 74 04 55 77 18 04 15 35 06 40 46 61 81 40 17 66 22 73 16 14 08 77 03 16 86 88 17 74 77 05 14 16 50 61 38 17 03 61 35 17 16 76 38 58 14 17 06 77 65 9356 77 46 06 66 75 16 58 16 14 41 22 17 38 05 61 66 47 66 03 04 15 16 73 77 14 16 06 61 15 04 66 03 17 04 14 17 74 77 03 03 04 66 46 16 17 38 60 16 71 61 14 46 17 66 71 65 18 04 88 61