Title:
WATERMARK-BASED ACCESS CONTROL METHOD AND DEVICE
Document Type and Number:
WIPO Patent Application WO2003065723
Kind Code:
A3
Abstract:
A method of controlling access to a resource (140) using a verifying device (130). A watermarking device (110) embeds an authorization code in a signal (120) using watermarking technology. The watermarked signal (120) is then transmitted to a verifying device (130), e.g. as a television or radio program or as a commercial related to the resource (140). In the verifying device (130), the authorization code is extracted from the watermarked signal (120) and an operation to be performed on the resource (140) is authorized in dependence on the extracted authorization code. Preferably the authorization comprises permission for executing a program (231), rendering and/or copying a multimedia object (213) or for activating a cheat function in an electronic game (220).
Inventors:
BRUEKERS ALPHONS A M L (NL)
MAANDONKS ARNOLDUS J L M (NL)
MITTERTREINER PETER-PAUL (NL)
VERBRUGGEN JOHANNES F E M (NL)
MAANDONKS ARNOLDUS J L M (NL)
MITTERTREINER PETER-PAUL (NL)
VERBRUGGEN JOHANNES F E M (NL)
Application Number:
PCT/IB2003/000214
Publication Date:
November 13, 2003
Filing Date:
January 20, 2003
Export Citation:
Assignee:
KONINKL PHILIPS ELECTRONICS NV (NL)
BRUEKERS ALPHONS A M L (NL)
MAANDONKS ARNOLDUS J L M (NL)
MITTERTREINER PETER-PAUL (NL)
VERBRUGGEN JOHANNES F E M (NL)
BRUEKERS ALPHONS A M L (NL)
MAANDONKS ARNOLDUS J L M (NL)
MITTERTREINER PETER-PAUL (NL)
VERBRUGGEN JOHANNES F E M (NL)
International Classes:
G06F21/10; G06F21/12; G09C5/00; H04L9/32; H04N7/08; H04N7/081; H04N7/16; (IPC1-7): H04N7/16
Domestic Patent References:
| WO1999048296A1 | 1999-09-23 |
Foreign References:
| US20010026618A1 | 2001-10-04 | |||
| US5710815A | 1998-01-20 | |||
| US5862260A | 1999-01-19 | |||
| US5971855A | 1999-10-26 |
Other References:
See also references of EP 1474924A2
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