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1883/02 : Auguste Kerckhoffs writes the first part of « La cryptographie militaire » in Journal des sciences militaires (vol. IX, pp. 161–191).
https://petitcolas.net/kerckhoffs/crypto_militaire_2.pdf
Critical Commentary
1883/02 : Auguste Kerckhoffs writes the first part of « La cryptographie militaire » in Journal des sciences militaires (vol. IX, pp. 161–191).