- 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...
- the substitution. By this means, a
rotor machine produces a
complex polyalphabetic substitution cipher,
which changes with
every key press. In classical...
-
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...
-
effective attack against polyalphabetic substitution ciphers.
Leone Battista Alberti, polymath/universal genius,
inventor of
polyalphabetic substitution (more...
- In
classical cryptography, the
running key
cipher is a type of
polyalphabetic substitution cipher in
which a text,
typically from a book, is used to provide...
-
changes of
electrical path
through an
Enigma scrambler implement a
polyalphabetic substitution cipher that
provides Enigma's security. The
diagram on...
- symbols. This
became known as the
Alberti Disk and was the very
first polyalphabetic cipher in history. Alberti's disk also
helped develop the monoalphabetic...
