Patent ID: 8718277

Claim:
A system for playback of at least one information carrier holding user information, the system comprising: a non-transitory information carrier for storing a plurality of scrambled access information bits that enable access to the user information, the access information bits comprise at least one physical parameter related to the information carrier, wherein the physical parameter stores integration detectable information on the information carrier, wherein the access information bits are scrambled according to one or more pre-determined scrambling methods, and the access information bits are stored in a variation of the at least one physical parameter, the variation is based on a spread spectrum technique, so as to be detectable only by integration detection, the one or more pre-determined scrambling methods including a permutation of the access information bits, wherein the information carrier stores an indicator for indicating the selected scrambling method; and a processor for performing integration detection to detect the variation of the at least one physical parameter stored on the information carrier.