Broadcom Corporation

Jason Monroe

Iue-Shuenn Chen

Francis Cheung

Kevin Patariu

Cynthia Dang

Tarek Kaylani

Mark Taylor Core

Jay Kwok Wa Li

Certain embodiments of the invention provide a method and system for memory to bus interface data encryption and decryption. A method for memory to bus interface data encryption and decryption may include encrypting data by a encryption/decryption engine or processor and transferring the encrypted data across a first bus interface to a data processing and/or storage device coupled to the first bus interface. The encryption engine may receive encrypted data from a device coupled to the first bus interface and decrypt the received encrypted data. In this regard, unencrypted data never traverses across the first bus interface, and is thereby not accessible to devices coupled to the first bus interface. An encryption function and a decryption function associated with the encryption/decryption engine may be integrated within a bus adapter, for example, an IDE bus adapter.

Method and system for data encryption and decryption

A system for implementing personal video recording, in which integrated drive electronics are incorporated in set-top box logic, instead of with a hard disk drive. This allows the set-top box logic to communicate directly to the hard disk, so that no intervening bus is necessary.

Set-top box integration of integrated drive electronics

An aspect of the of the invention may include the transfer of a block of data from a first memory location to a second memory location in a DRAM. During the transfer of the block of data from the first memory location, if an encryption mode is selected, the data may be buffered, encrypted, and then stored in the second memory location. If a decryption mode is selected, the transferred data may be buffered, decrypted and then stored in the second memory location. If a bypass mode is selected, the data may be buffered and then stored in the second memory location. In this regard, the encryption/decryption operations may be bypassed.

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Ladera Ranch, CA, United States of America

Jason Monroe