A fiber, a single filament of natural material, such as cotton, linen or wool, or artificial material such as nylon, polyester, metal or mineral fiber, or man made natural fibre like Viscose, Modal & Excel is measured in terms of linear mass density, the weight of a given length of fiber.
The vernam cipher, sometimes known as the 'one time pad', is a stream cipher, which providing certain requirements are met, can be theoretically unbreakable.
In cryptography, a cipher (or cypher) is an algorithm for performing encryption or decryption â a series of well-defined steps that can be followed as a procedure. An alternative, less common term is encipherment. In non-technical usage, a âcipherâ is the same thing as a âcodeâ; however, the concepts are distinct in cryptography.