The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 06, 2014
Filed:
Feb. 05, 2004
Aalbert Stek, Eindhoven, NL;
Martinus Wilhelmus Blum, Eindhoven, NL;
Bart Van Rompaey, Eindhoven, NL;
Jacobus Petrus Josephus Heemskerk, Eindhoven, NL;
Aalbert Stek, Eindhoven, NL;
Martinus Wilhelmus Blum, Eindhoven, NL;
Bart Van Rompaey, Eindhoven, NL;
Jacobus Petrus Josephus Heemskerk, Eindhoven, NL;
Koninklijke Philips N.V., Eindhoven, NL;
Abstract
An information carrier for holding user information, the information carrier comprising access information in the form of access information bits for accessing the user information, the access information bits being stored on the information carrier in a variation of a parameter, which variation is detectable by integration detection. The access information bits are scrambled according to a pre-determined scrambling method. By scrambling the access information bits according to a pre-determined scrambling method, detection of the access information is not possible as long as the scrambling method is not known. Using the integration detection technique, the only way to obtain the access information is by knowing how the signal obtained after reading-out the area comprising the access information bits must be processed. In this way illegal retrieval of the user information is further prevented.