Bun (hairstyle) Bun (hairstyle) A bun is a type of hairstyle wherein the hair is pulled back from the face, twisted or plaited, and wrapped in a circular coil around itself, typically on top or back of the head or just above the neck. A bun can be secured with a hair tie, barrette, bobby pins, one or more hair sticks, a hairnet, or a pen or pencil. Hair may also be wrapped around a piece called a "rat". Alternatively, hair bun inserts, or sometimes rolled up socks, may also be used to create donut-shaped buns. Buns may be tightly gathered, or
Device Keys Kd (i=0,1,…,n-1), are provided by "AACS LA". The set of Device Keys may either be unique per device, or used commonly by multiple devices. A device shall treat its Device Keys as highly confidential. The MKB is encrypted in a subset difference tree approach. In order to decrypt it, a device must know the right Processing Key (P) which is available via the subset-difference tree process.Essentially, the set of Device Keys are arranged in a tree such that any given Device Key can be used to find lower level Processing keys. The processing keys at higher position in the tree