Nxp Usa, Inc.

Juergen Frank

Michael Andreas Staudenmaier

Manfred P Thanner

Carl Culshaw

Robert Cristian Krutsch

A memory controller is used to verify authenticity of data stored in a first memory unit, and includes a secure memory unit which stores a pre-stored value representative of the authenticity of the data to be written in the first memory unit. A processing system calculates a value representative of the data in the first memory unit after a write cycle. The calculation of the calculated value is triggered by the write cycle. The calculated value is compared with the pre-stored value to verify whether the data stored in the first memory unit after the write cycle has been altered in accordance with the authenticity. By comparing the calculated value with the pre-stored value, authenticity of the data stored in the first memory unit after the write cycle is verified, thus preventing the memory controller from operating if the data written to the first memory unit is not authentic.

Memory controller to verify authenticity of data

A communication apparatus for preventing the broadcasting of unauthorized messages on a broadcast bus network, the communication apparatus comprising:

Illegal message destroyer

A built-in self test system comprises an integrated circuit device comprising a plurality of functional units coupled to built-in self test circuitry; a low power control unit operable to switch the integrated circuit device into a low power mode and to generate a BIST wake-up signal during or before entering the low power mode; and a built-in self test control unit coupled to the built-in self test circuitry and the low power control unit and arranged to initiate a built-in self test when receiving the BIST wake-up signal.

Built-in self test system, system on a chip and method for controlling built-in self tests

A device securely accesses data in a memory via an addressing unit which provides a memory interface for interfacing to a memory, a core interface for interfacing to a core processor and a first and second security interface. The device includes a security processor HSM for performing at least one security operation on the data and a remapping unit MMAP. The remapping unit enables the security processor to be accessed by the core processor via the first security interface and to access the memory device via the second security interface according to a remapping structure for making accessible processed data based on memory data. The device provides a clear view on encrypted memory data without requiring system memory for storing the clear data.

Device having a security module

A 3D graphics system uses encryption keys to decrypt received and stored texture tiles of a texture in accordance with received and stored texture tile status data which indicates whether a texture tiles is encrypted or not and which one of the encryption keys is used. The decrypted texture tiles are rendered and at least a plurality of the rendered tiles is encrypted. The encrypted rendered tiles are stored in a frame buffer. Buffer tile status data is stored which indicates whether a rendered tile is encrypted or not before storage in the frame buffer, and which one of the encryption keys has been used. The encrypted rendered tiles stored in the frame buffer are decrypted in accordance with the buffer tile status data.

Growing community of inventors

Munich, Germany

Juergen Frank