| Patent application number | Description | Published |
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| 20090172331 | Securing content for playback - A graphics engine may include a decryption device, a renderer, and a sprite or overlay engine, all connected to a display. A memory may have a protected and non-protected portions in one embodiment. An application may store encrypted content on the non-protected portion of said memory. The decryption device may access the encrypted material, decrypt the material, and provide it to the renderer engine of a graphics engine. The graphics engine may then process the decrypted material using the protected portion of the memory. Only graphics devices can access the protected portion of the memory in at least one mode, preventing access by outside sources. In addition, the protected memory may be stolen memory that is not identified to the operating system, making that stolen memory inaccessible to applications running on the operating system. | 07-02-2009 |
| 20100027790 | METHODS FOR AUTHENTICATING A HARDWARE DEVICE AND PROVIDING A SECURE CHANNEL TO DELIVER DATA - A method for delivering audio/video data through a hardware device using a software application comprises, at the hardware end, receiving an encrypted application key, an encrypted random session key, and encrypted audio/video data from the software. The hardware then decrypts the encrypted application key using a secret encryption key, decrypts the encrypted random session key using the application key, and decrypts the encrypted audio/video data using the random session key. The hardware may then deliver the unencrypted audio/video data by way of a display and speakers. The secret encryption key is securely embedded within the hardware device at an earlier point in time. | 02-04-2010 |
| Patent application number | Description | Published |
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| 20090296938 | Methods and apparatus for protecting digital content - A processing system to serve as a source device for protected digital content comprises a processor and control logic. When used by the processor, the control logic causes the processing system to receive a digital certificate from a presentation device. The processing system then uses public key infrastructure (PKI) to determine Whether the presentation device has been authorized by a certificate authority (CA) to receive protected content. The processing system may also generate a session key and use the session key to encrypt data. The processing system may transmit the encrypted data to the presentation device only if the presentation device has been authorized by the CA to receive protected content. Presentation devices and repeaters may perform corresponding operations, thereby allowing content to be transmitted and presented in a protected manner. Other embodiments are described and claimed. | 12-03-2009 |
| 20090296941 | Methods and apparatus for protecting digital content - A processing system to serve as a source device for protected digital content comprises a processor and control logic. The processing system may generate and save a first master key, and may transmit that key to a first receiving device for use during a first session. During a second session, the processing system may obtain an identifier for a candidate receiving device. The processing system may use the identifier to determine whether the processing system contains a master key for the candidate receiving device. If the processing system such a master key, the processing system may send verification data concerning that key to the candidate receiving device, and may use that key to encrypt a session key for the second session. If not, a second master key may be generated and transmitted to the candidate receiving device for use during the second session. Other embodiments are described and claimed. | 12-03-2009 |
| 20100005289 | Methods and apparatus for protecting digital content - A processing system to serve as a source device for protected digital content comprises a processor and control logic. When used by the processor, the control logic causes the processing system to generate cipher data, based at least in part on (a) a session key and (b) at least one constant value obtained from a certificate authority. The processing system may use the cipher data to encrypt data, and the processing system may transmit the encrypted data to a receiving device via a wireless connection. Other embodiments are described and claimed. | 01-07-2010 |
| 20100077228 | Implementing Portable Content Protection to Secure Secrets - A source-level compiler may randomly select compilation conventions to implement portable content protection, securing the secrets embedded in a program by shuffling associated data. The program may be developed using a source language that is applicative on the associated data. To obscure the embedded secrets, in one embodiment, pre-compiler software may be deployed for compiling the program in a random-execution-order based on a random seed indication that randomly selects compilation conventions and a shuffling algorithm that moves the associated data across the program during execution. | 03-25-2010 |
| 20100183154 | APPARATUS AND METHOD FOR DISTRIBUTING PRIVATE KEYS TO AN ENTITY WITH MINIMAL SECRET, UNIQUE INFORMATION - In some embodiments, a method and apparatus for distributing private keys to an entity with minimal secret, unique information are described. In one embodiment, the method includes the storage of a chip secret key within a manufactured chip. Once the chip secret key is stored or programmed within the chip, the chip is sent to a system original equipment manufacturer (OEM) in order to integrate the chip within a system or device. Subsequently, a private key is generated for the chip by a key distribution facility (KDF) according to a key request received from the system OEM. In one embodiment, the KDF is the chip manufacturer. Other embodiments are described and claims. | 07-22-2010 |
