General Instrument Corporation

Samsung Electronics Co., Ltd.

Peter Chen

Alexander Medvinsky

Jiang Zhang

Bill Franks

Qirui Yang

Devasena Inupakutika

Bradley Carpenter

Bridget Davis

A method for data storage includes receiving, by a storage device, a read request for data, the read request being associated with a request size, determining that a first cache area associated with a first portion of the data is in a first portion of a cache, the first cache area having a first size that is smaller than the request size, determining that a second cache area associated with a second portion of the data is in a second portion of the cache, the second cache area having a second size that is smaller than the request size and differently sized than the first size, and based on the read request, reading the first portion of the data from the first cache area and reading the second portion of the data from the second cache area.

Systems and methods for cache allocation

A method, device and system for authenticating a programmable hardware device, such as a programmable hardware chip, and a command received by the programmable hardware device. A secure processor or other trusted source authenticates the programmable hardware chip by verifying, with the secure processor's own verification key, a random number sent to the programmable hardware chip and encrypted using a verification key embedded within the programmable hardware chip, since the nature of the encryption is such that only the original logic function that includes the verification key can encrypt the data correctly. A command received by the programmable hardware chip is authenticated by verifying that a command authentication token received by the programmable hardware chip is generated using the correct command authentication key and consequently verifying that the command is received from the secure processor, as only the party who has the command authentication key can encrypt the data correctly.

Methods, apparatus and system for authenticating a programmable hardware device and for authenticating commands received in the programmable hardware device from a secure processor

A method, device and system for securely managing debugging processes within a communication device, such as a set top box or other multimedia processing device. For example, a security processor (SP) within the communication device manages the lifetime (LT) of any access token issued for use in activating debugging privileges within the communication device. The security processor authenticates an issued access token and securely delivers appropriate debug authorization information to the device controller. The security processor uses its secure, internal timer to count down the lifetime and update the remaining lifetime of the issued access token during the processing of each command by the security processor. In addition to securely managing the issuance of the access token and it's remaining lifetime, the updating process reduces any impact on the normal communications within the device. The method overcomes the issue of the communication device not having a secure internal clock.

Method and apparatus for secure management of debugging processes within communication devices

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San Diego, CA, United States of America

Peter Chen