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The four-square cipher is a manual symmetric encryption technique. It was invented by the French cryptographer Felix Delastelle.
Four-square cryptanalysis, Using four-square & Overview
Explore the main themes, entities and connections around Four-square cipher. Start with the topic map, then use the sections below for research and deeper semantic analysis.
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High-confidence facts extracted from structured source data. Use them as anchors for further research.
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four-square ciphertext plaintext digraphs first encryption matrices digraph cipher matrix letter letters substitution two technique key playfair known ciphers frequency
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Four-square cipher | is a | manual symmetric encryption technique | 0.90 | text |
| Four-square cipher | related to Four-square cryptanalysis | Like | 0.60 | section |
| Four-square cipher | related to Four-square cryptanalysis | Obtaining | 0.60 | section |
| Four-square cipher | related to Four-square cryptanalysis | When | 0.60 | section |
| Four-square cipher | related to Four-square cryptanalysis | Cryptanalysis | 0.60 | section |
| Four-square cipher | related to Four-square cryptanalysis | This | 0.60 | section |
| Four-square cipher | related to Four-square cryptanalysis | If | 0.60 | section |
| Four-square cipher | related to Four-square cryptanalysis | For | 0.60 | section |
| Four-square cipher | related to Four-square cryptanalysis | MI LI TA RY | 0.60 | section |
| Four-square cipher | related to Four-square cryptanalysis | Patterns | 0.60 | section |
| Four-square cipher | related to Four-square cryptanalysis | Candidate | 0.60 | section |
| Four-square cipher | related to Using four-square | The | 0.60 | section |
These clusters group vocabulary that occurs around closely connected concepts in the source material.
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