Abstract: A system and method for communicating data between a first software and a second software located on first and second devices, respectively, has a hardware driver and memory associated with each device. Each communication of data from the first software to the second software allocates memory to manage data to be communicated from the first software to the second software, provides memory allocation information to the hardware driver associated with the first software, and transmits the data from the first hardware driver to the second hardware driver for delivery to the second software via the memory associated with the second software.

Abstract: There is disclosed a cache memory controller for storing cache data within a cache, the cache data comprising an unsecured version data to corresponding secured first data.

Abstract: A method and system for detecting tampering of authenticated memory blocks that are accessible by an untrusted host processor, by (1) periodically re-authenticating the memory blocks from a trusted computing environment, and (2) disabling accessing of the memory blocks by the untrusted host processor when the re-authenticating fails. In one implementation, each of the memory blocks has an authentication code, and the accessing of the memory blocks is disabled by disabling the untrusted host processor. The memory blocks may be re-authenticated sequentially, or randomly, e.g., based on a random block selection based on the block location, or based on temporal randomness. The re-authenticating is preferably effected by an authentication module in the trusted computing environment.

Abstract: A method for determining the color depths of the video data for a selected frame in High-bandwidth Digital Content Protection (HDCP) video data transmitted over a High Definition Multimedia Interface (HDMI), in which (a) the beginning of the selected frame is marked with a vertical synchronization (VSYNC) signal and (b) a mark in a window of opportunity (WOO) for the selected frame indicates whether or not that frame is encrypted. The method detects, for the selected frame, the length of the interval between a VSYNC signal and the location of at least one of (i) the start of the corresponding WOO and (ii) the mark indicating whether or not the selected frame is encrypted, and then determines the color depth of the video data for the selected frame based on the detected length.

Abstract: A method and system for detecting tampering of authenticated memory blocks that are accessible by an untrusted host processor, by (1) periodically re-authenticating the memory blocks from a trusted computing environment, and (2) disabling accessing of the memory blocks by the untrusted host processor when the re-authenticating fails. In one implementation, each of the memory blocks has an authentication code, and the accessing of the memory blocks is disabled by disabling the untrusted host processor. The memory blocks may be re-authenticated sequentially, or randomly, e.g., based on a random block selection based on the block location, or based on temporal randomness. The re-authenticating is preferably effected by an authentication module in the trusted computing environment.

Abstract: A method and system for detecting tampering of authenticated memory blocks that are accessible by an untrusted host processor. by (1) periodically re-authenticating the memory blocks from a trusted computing environment, and (2) disabling accessing of the memory blocks by the untrusted host processor when the re-authenticating fails. In one implementation, each of the memory blocks has an authentication code, and the accessing of the memory blocks is disabled by disabling the untrusted host processor. The memory blocks may be re-authenticated sequentially or randomly, e.g., based on a random block selection based on the block location, or based on temporal randomness. The re-authenticating is preferably effected by an authentication module in the trusted computing environment.

Abstract: A method and system for detecting tampering of authenticated memory blocks that are accessible by an untrusted host processor. by (1) periodically re-authenticating the memory blocks from a trusted computing environment, and (2) disabling accessing of the memory blocks by the untrusted host processor when the re-authenticating fails. In one implementation, each of the memory blocks has an authentication code, and the accessing of the memory blocks is disabled by disabling the untrusted host processor. The memory blocks may be re-authenticated sequentially.or randomly, e.g., based on a random block selection based on the block location, or based on temporal randomness. The re-authenticating is preferably effected by an authentication module in the trusted computing environment.

Abstract: A system and method for communicating data between a first software and a second software located on first and second devices, respectively, has a hardware driver and memory associated with each device. Each communication of data from the first software to the second software allocates memory to manage data to be communicated from the first software to the second software, provides memory allocation information to the hardware driver associated with the first software, and transmits the data from the first hardware driver to the second hardware driver for delivery to the second software via the memory associated with the second software.

Abstract: There is disclosed a cache memory controller for storing cache data within a cache, the cache data comprising an unsecured version data to corresponding secured first data.

Abstract: A method for determining the color depths of the video data for a selected frame in High-bandwidth Digital Content Protection (HDCP) video data transmitted over a High Definition Multimedia Interface (HDMI), in which (a) the beginning of the selected frame is marked with a vertical synchronization (VSYNC) signal and (b) a mark in a window of opportunity (WOO) for the selected frame indicates whether or not that frame is encrypted. The method detects, for the selected frame, the length of the interval between a VSYNC signal and the location of at least one of (i) the start of the corresponding WOO and (ii) the mark indicating whether or not the selected frame is encrypted, and then determines the color depth of the video data for the selected frame based on the detected length.