- A
polyalphabetic cipher is a substitution,
using multiple substitution alphabets. The Vigenère
cipher is
probably the best-known
example of a polyalphabetic...
-
monoalphabetic cipher uses
fixed substitution over the
entire message,
whereas a
polyalphabetic cipher uses a
number of
substitutions at
different positions in the...
- this process. The Vigenère
cipher is
therefore a
special case of a
polyalphabetic substitution.
First described by
Giovan Battista Bellaso in 1553, the...
- transposition,
polyalphabetic substitution, and a kind of "additive" substitution. In
rotor machines,
several rotor disks provided polyalphabetic substitution...
-
changes of
electrical path
through an
Enigma scrambler implement a
polyalphabetic substitution cipher that
provides Enigma's security. The
diagram on...
-
printed work on cryptology.
Trithemius used the
tabula recta to
define a
polyalphabetic cipher,
which was
equivalent to Leon
Battista Alberti's
cipher disk...
-
known as Kasiski's test or Kasiski's method) is a
method of
attacking polyalphabetic substitution ciphers, such as the Vigenère cipher. It was
first published...
- the substitution. By this means, a
rotor machine produces a
complex polyalphabetic substitution cipher,
which changes with
every key press. In classical...
-
where just one
cipher alphabet is used. It is also
possible to have a
polyalphabetic substitution cipher,
where multiple cipher alphabets are used. The encoder...
- 1467 by
Italian architect Leon
Battista Alberti, was one of the
first polyalphabetic ciphers. In the
opening pages of his
treatise De
componendis cifris [it]...
