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La Cryptographie: ou l'Art d'écrire en Chiffres
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ISBN10: 1530596114
ISBN13: 9781530596119
Publisher: Createspace
Published: Mar 17 2016
Pages: 114
Weight: 0.36
Height: 0.24 Width: 6.00 Depth: 9.00
Language: French
ISBN13: 9781530596119
Publisher: Createspace
Published: Mar 17 2016
Pages: 114
Weight: 0.36
Height: 0.24 Width: 6.00 Depth: 9.00
Language: French
Nous allons essayer de faire connaître quelques-uns des procédés mis en usage afin de permettre à des personnes séparées par des distances souvent considérables, de communiquer entre elles, en recouvrant ces communications du voile du mystère. Ces procédés forment une véritable science qui a reçu, comme tant d'autres, un nom tiré du grec. La Cryptographie ou Stéganographie est l'art d'écrire de façon à dérober à autrui la connaissance de ce qu'on a tracé. On peut s'efforcer de dissimuler l'existence de l'écrit. On emploie, en ce but, les encres du sympathie dont nous parlerons plus tard, ou bien l'on tâche de cacher soigneusement le papier auquel on a confié son secret. Mais plus habituellement on a recours aux divers procédés en usage afin de jeter, sur une dépêche qui peut tomber dans des mains indiscrètes, un voile qu'on fait de son mieux pour rendre impénétrable...
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