A low complexity encryption method for content encoded by rateless codes

摘要

For low complexity method of protecting contents, which is encoded by a rate-less codes, methods and apparatus are disclosed herein, where, in that it is sufficient to encrypt only a subset of the rateless coding packets should be noted. In one embodiment, the step of performing rateless coding for the first set of data blocks, generates a rateless coded data block, the method, the following figures for rateless coded data blocks each and a step on the basis of, for encrypting a subset of the rateless coded data block. [Selection] Figure Figure 1