A null cipher, also known as concealment cipher, is an ancient form of encryption where the plaintext is mixed with a large amount of non-cipher material. Today it is regarded as a simple form of steganography, which can be used to hide ciphertext.
Pro-drop parameter or Null subject parameter is the parameter which determines whether a language is a pro-drop language or not. A positive setting of the parameter allows an empty pro-element...
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 a very long keystream....
In mathematics, a null semigroup is a semigroup with an absorbing element, called zero, in which the product of any two elements is zero. If every element of a semigroup...
