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.
Nergal is the (southern) Mesopotamian god of death, pestilence and plague, and Lord of the Underworld. The kudurru of the Kassite king Meli-Å ipak (r. 1186-1172 BCE) at the Louvre Museum. The second register from the top on the left side shows the symbol of Nergal, a weapon on top of a dragon.