Information carrier comprising access information
AssigneeKoninklijke Philips N.V.
InventorsAalbert Stek, Martinus W. Blum, Bart Van Rompaey
Life of this patent
Estimating the term…
Abstract
An apparatus for reading out information from an information carrier includes a reading unit for reading out user information and access information from the information carrier. The user information are stored in a first region of the information carrier and the access information are stored in a second region of the information carrier. The apparatus further includes an access controller for providing access to the user information in dependence on the access information. The access information are stored in a first portion of the second region, and the dummy information are stored in a second portion of the second region according to a similar format as used for storing the access information.
Claims28
An apparatus for reading out information from an information carrier, the apparatus comprising:
- a reader configured for reading out user information and access information from the information carrier, the user information being stored in a first region of the information carrier and the access information being stored in a second region of the information carrier, wherein the second region is different from the first region and is devoid of user information, and wherein the first region for storing the user information follows the second region and is between the second region and a lead-out zone of the information carrier;
- and
- a controller configured for providing access to the user information depending on the access information;
- wherein the access information is stored in a first portion of the second region, and wherein dummy information is stored in a second portion of the second region according to a similar format as used for storing the access information in order to hide the access information.
A method of hiding access information on an information carrier, the information carrier comprising user information stored in a first region of the information carrier and the access information being for accessing the user information, the method comprising the acts of:
- storing the access information in a first portion of a second region of the information carrier, wherein the second region is different from the first region and is devoid of user information;
- and
- storing dummy information in a second portion of the second region different from the first portion according to a similar format as used for storing the access information in order to hide the access information
- wherein the first region for storing the user information follows the second region and is between the second region and a lead-out zone of the information carrier.
A tangible computer-readable storage medium, that is not a transitory propagating signal or wave, for insertion into a reading apparatus for reading access information for reading user information from the;
- the medium comprising:
- a first region comprising the user information;
- a second region having a first portion and a second portion, the first portion comprising access control information and the second portion comprising dummy information,
- wherein the second region is different from the first region and is devoid of user information,
- wherein the first region for storing the user information follows the second region and is between the second region and a lead-out zone of the medium, and
- wherein the dummy information is stored in the second portion of the second region according to a similar format as used for storing the access control information in the first portion of the second region in order to hide the access information.
Dependencies are inferred from the claim text.