Cardan grille
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English
[edit]
Etymology
[edit]Proposed in 1550 by Girolamo Cardano (1501-1576), known in French as Jérôme Cardan.
Noun
[edit]Cardan grille (plural Cardan grilles)
- (cryptography) A sheet of card or thin metal, etc., used in composing secret messages. The words of the message are written through a number of holes cut arbitrarily in the sheet, and the remaining paper is then filled with irrelevant words to disguise it.