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LES SECRETS DE NOS P?RES

RECUEILLIS

PAR LE BIBLIOPHILE JACOB

CRYPTOGRAPHIE

L'ART D'?CRIRE EN CHIFFRES

PARIS ADOLPHE DELAHAYS, LIBRAIRE-?DITEUR 4-6, RUE VOLTAIRE, 4-6

PARIS.--IMP. SIMON RA?ON ET COMP., RUE D'ERFURTH, 1.

CRYPTOGRAPHIE

L'ART D'?CRIRE EN CHIFFRES.

CHAPITRE PREMIER.

D?FINITION DE LA CRYPTOGRAPHIE; SON ORIGINE; NOTIONS HISTORIQUES.

Nous allons essayer de faire conna?tre quelques-uns des proc?d?s mis en usage afin de permettre ? des personnes s?par?es par des distances souvent consid?rables, de communiquer entre elles, en recouvrant ces communications du voile du myst?re.


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