- Félix-Marie
Delastelle (2
January 1840 – 2
April 1902) was a
French cryptographer, best
known for
inventing the
bifid cipher,
first presented in the Revue...
- a
classical cipher invented by Félix
Delastelle and
described in 1902.
Extending the
principles of
Delastelle's earlier bifid cipher, it
combines the...
-
fractionation to
achieve diffusion. It was
invented around 1901 by
Felix Delastelle. First, a
mixed alphabet Polybius square is
drawn up,
where the I and...
-
encryption technique. It was
invented by the
French cryptographer Felix Delastelle. The
technique encrypts pairs of
letters (digraphs), and thus
falls into...
- (medical doctor)
William Crabtree (merchant)
Nathan Daboll (cooper)
Felix Delastelle (bonded warehouseman)
Martin Demaine (goldsmith and gl**** artist) Humphry...
- Fleissner's
method could be
applied to a
fractionating cipher, such as a
Delastelle Bifid or Four-Square, with
considerable increase in security.
Grille ciphers...
- are clearer. The
French ship-owner
Michel Delastelle ****ed
Mercure out in 1798 and
appointed Charles Delastelle, a
relative of his, as captain. Mercure...
-
Several other practical polygraphics were
introduced in 1901 by
Felix Delastelle,
including the
bifid and four-square
ciphers (both digraphic) and the...
-
generally requires a much
larger ciphertext in
order to be useful. Félix
Delastelle described the
cipher in his 1901 book Traité élémentaire de cryptographie...
- column, SYLLABARY, Porta,
columnar transposition, Beaufot, S-box mapping,
Delastelle, and Nilist. Key-based ciphers: keyword, OTP, Condi, AMSCO, Vigenère,...
