Several new methods for protecting digital rights - proposals from the standpoints of information security

摘要

In this paper, we present several new methods for protecting the various types of unauthorized reception of contents provided by such as Conditional Access Systems. We propose the using of a set of keys, each of which is chosen by the small bits of header information sent by the providers, Rights Management Organizations (RMO), etc. We show the method of embedding the M sequence, for tracing traitors, in the set of keys.