Учебное пособие: Криптоанализ классических шифров
| N | О | Р | Q | R | S | т | U | V | W | X | Y | Z | |
| N | 7 | 54 | 7 | 1 | 7 | 44 | 124 | 6 | 1 | 15 | 0 | 12 | 0 |
| О | 134 | 13 | 23 | 0 | 91 | 23 | 42 | 55 | 16 | 28 | 0 | 4 | 1 |
| Р | 0 | 27 | 9 | 0 | 33 | 14 | 7 | 6 | 0 | 0 | 0 | 0 | 0 |
| Q | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 17 | 0 | 0 | 0 | 0 | 0 |
| R | 16 | 60 | 4 | 0 | 24 | 37 | 55 | 6 | 11 | 4 | 0 | 28 | 0 |
| S | 12 | 56 | 17 | 6 | 9 | 48 | 116 | 35 | 1 | 28 | 0 | 4 | 0 |
| Т | 6 | 79 | 7 | 0 | 49 | 50 | 56 | 21 | 2 | 27 | 0 | 24 | 0 |
| U | 31 | 1 | 15 | 0 | 47 | 39 | 31 | 0 | 3 | 0 | 0 | 0 | 0 |
| V | 0 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 0 |
| W | 8 | 15 | 0 | 0 | 0 | 4 | 2 | 0 | 0 | 1 | 0 | 0 | 0 |
| X | 0 | 1 | 5 | 0 | 0 | 0 | 3 | 0 | 0 | 1 | 0 | 0 | 0 |
| Y | 5 | 17 | 3 | 0 | 4 | 16 | 30 | 0 | 0 | 5 | 0 | 0 | 0 |
| Z | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Пример криптоанализа шифра замены
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