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Delastelle is described in multiple online sources, as addition to our editors' articles, see section below for printable documents, Delastelle books and related discussion.

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Félix Delastelle - Wikipedia, the free encyclopedia
Félix Marie Delastelle (2 January 1840 – 2 April 1902) was a Frenchman most famous for his invention of several systems of polygraphic substitution ciphers ...
Bifid cipher - Wikipedia, the free encyclopedia
CrypTool-Online / Ciphers / Bifid
Background. The Bifid cipher was developed in 1901 by the Frenchman Felix Delastelle (*1840; † 1902). He also developed the Four Square cipher.
Four-Square Cipher - Practical Cryptography
Felix Delastelle (1840 - 1902) invented the four-square cipher, first published in a book in 1902. Delastelle was most famous for his invention of several systems ...
Bifid cipher - Geocaching Toolbox
The bifid cipher is one of the classical ciphers and was invented around 1901 by Felix Delastelle. Bifid is a combination of substitution and fractionation, this ...

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