| Patent application number | Description | Published |
|---|
| 20080205254 | Content Protection on a Record Carrier - The invention relates to a record carrier having a data zone ( | 08-28-2008 |
| 20080226067 | Method and Circuit for Encrypting a Data Stream - Current legislation requires the possibility of encryption when storing television programmes received by broadcast. However, legacy playback apparatuses will not be able to play back such encrypted data in a regular way, but possibly in a wrong way. This may result in problems like damage of speakers. Therefore, the application intends to hide any of such possibly damaging streams by intentionally providing such streams with a wrong identification during the encryption process. The application provides among others a method and circuit for encryption and a method and circuit for decryption. The application is especially suitable for DVD recorders, but may also be employed for other video and/or audio recorders. The invention may even be used for encrypting non-audiovisual data. | 09-18-2008 |
| 20080235810 | Method of Authorizing Access to Content - A method of and source device ( | 09-25-2008 |
| 20080250147 | Proximity Check Server - This invention provides a method, proximity check server ( | 10-09-2008 |
| 20080285429 | Side-Channel for Record Carriers with Spiral Tracks - In order to create a record carrier having a side-channel which cannot be copied with a channel-bit recorder, the record carrier ( | 11-20-2008 |
| 20080285744 | Block Ciphering System, Using Permutations to Hide the Core Ciphering Function of Each Encryption Round - In a system ( | 11-20-2008 |
| 20080288412 | Method and Device For Controlling Distribution And Use of Digital Works - The present invention relates to a method and device for controlling distribution and use of a digital work stored together with an attached usage right information on a record carrier. The attached usage right information is encrypted or verified by using a hidden information which is changed at every change of said usage right information. The hidden information may be an encryption key used for encrypting the usage right information, or a checksum of a data block containing the usage right information. Thus, a “copy and restore attack” is not successful, since it will lead to a mismatch between the hidden information and the restored usage right information. | 11-20-2008 |
| 20080291801 | Record Carrier with Copy Protection Means - In summary, ROM marks (such as wobbles, lateral deviations in the spiral with lands and pits in an optical disc) are used on optical media to ensure consumer-grade copying devices cannot duplicate original media. An additional level of security is that the detection of the side channel information requires knowledge of a certain secret, which must be hidden well in authorized players. If the secret leaks, a professional pirate will be able to detect the ROM mark and duplicate the original medium with the side channel information intact. The present invention proposes that instead of a single ROM mark, many ROM marks are applied to a disc. Further, devices are divided into groups, and each group has the capability to only detect one mark from the group. This way, if a secret is obtained from a device, the disc can be duplicated, but only a limited number of devices will be able to use this disc. Creating a disc that can be played in any device requires the hacking of one device from every group. | 11-27-2008 |
| 20080301456 | Efficient Secure Forensic Watermarking - The invention relates to a watermark generation method for generating watermarks to be embedded in digital media, where said watermark is generated by combining at least two watermark patterns from a set of watermark patterns. The set of watermark patterns are divided into at least two subsets of watermark patterns, and the subsets are hierarchically related and the watermark patterns in said watermark are directly related watermark patterns. Directly related means that the watermark patterns are related like parent and child in a hierarchical structure e.g. a tree structure. Further, the invention relates to an apparatus adapted to generate watermarks to be embedded in media. | 12-04-2008 |
| 20090070588 | RENEWABLE WATERMARK FOR THEATRICAL CONTENT - The present invention relates to a method for a content provider of renewing the watermarking of theatrical content and for updating consumer devices to detect said renewed watermark, wherein a watermark is embedded in said theatrical content using at least a first watermark noise pattern. Renewing is performed by said content provider distributing at least a second watermark noise pattern, which is used for embedding and detecting said watermark in said theatrical content, to said consumer devices using a broadcast encryption technology. The invention further relates to a content provider system adapted to be used for renewing the watermarking of theatrical content and for updating consumer devices to detect said renewed watermark. | 03-12-2009 |
| 20090276635 | CONTROLLING DISTRIBUTION AND USE OF DIGITAL WORKS - In order to efficiently prevent the save-and-restore attack on usage rights associated with digital work, these usage rights are protected by a hidden channel. In order to make it a difficult or expensive to manipulate the hidden channel, a device is proposed comprising: writing means ( | 11-05-2009 |
| 20100153724 | SYSTEM AND METHOD FOR A KEY BLOCK BASED AUTHENTICATION - The present invention relates to a system ( | 06-17-2010 |
| 20100161972 | DEVICE AND METHOD FOR KEY BLOCK BASED AUTHENTICATION - The invention relates to a device ( | 06-24-2010 |
