Crypto.Classical.Cipher.Vigenere

Documentation

newtype Vigenère a

A Vigenère Cipher is just a Stream Cipher with a finite key, shorter than the length of the plaintext. The key is repeated for the entire length of the plaintext.

Constructors

Vigenère

Fields

_vigenère :: a

Instances

Monad Vigenère

Functor Vigenère

Applicative Vigenère

Eq a => Eq (Vigenère a)

Show a => Show (Vigenère a)

Cipher [(/) ℤ 26] Vigenère

vigenère :: forall a a. Iso (Vigenère a) (Vigenère a) a a

vigKey :: ByteString -> [ℤ / 26] -> [ℤ / 26]

Determine a Vigenère key from a Stream key. Weakness here: key length is a factor of the plaintext length.