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1883/01 : Auguste Kerckhoffs writes the first part of « La cryptographie militaire » in Journal des sciences militaires (vol. IX, pp. 5–38).
http://petitcolas.net/kerckhoffs/crypto_militaire_1.pdf
Critical Commentary
1883/01 : Auguste Kerckhoffs writes the first part of « La cryptographie militaire » in Journal des sciences militaires (vol. IX, pp. 5–38).