"was entirely and literally based" on a 1925 book by French colonel Marcel Givierge, Cours de cryptographie (Cryptography Course)
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"was entirely and literally based" on a 1925 book by French colonel Marcel Givierge, Cours de cryptographie (Cryptography Course)
Text from Wikipedia, available under CC BY-SA 4.0.
Captured 2026-08-18 from Wikipedia. The archived copy is preserved so this citation survives link rot.