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AssigneeKoninklijke Philips Electronics N.V.
InventorsAalbert Stek, Martinus Wilhelmus Blum, Barg Van Rompaey
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The invention relates to an information carrier for holding user information, the information carrier comprising access information for accessing the user information, the access information being stored in a pre-determined first region on the information carrier. The information carrier further comprises at least one further region different from the first region, the further region comprising dummy information. The invention is based on the insight that the noise level of a read out signal increases somewhat in the region(s) where the access information is hidden. To avoid this difference in noise level between regions with and without the access information, this access information is assigned for only a specific region of the information carrier, but dummy information is also written in other regions. Due to this, an improved copy protection system against illegal read out of the user information present or to be present on the information carrier is realized.
1-18. (canceled)
A method of hiding access information on an information carrier, the information carrier comprising user information and the access information being for accessing the user information, the method comprising the acts of:
The method of claim 27, further comprising the act of burying the access information in the user information.
The method of claim 27, wherein the act of storing the access information includes storing the access information in a side channel of the information carrier.
Dependencies are inferred from the claim text.