Patent ID: 8392727

Claim:
A graphics card comprising: a plurality of registers, wherein each register stores a respective one of a plurality of keys that are not available unencrypted outside a controller and an encryption/decryption engine; said controller for receiving a request to make available at least a portion of an operating system (OS), receiving a given one of said plurality of keys, transferring at least said portion of said operating system (OS) in an encrypted format from a data storage medium to said encryption/decryption engine, transferring said given one of said plurality of keys to said encryption/decryption engine, and making available said operating system (OS) in a decrypted format; and said encryption/decryption engine for decrypting at a hardware level at least said portion of said operating system (OS) in said encrypted format using said given one of said plurality of keys and counter mode (CTR) of advanced encryption standard (AES) based on a block number and a byte aligned block address of said portion of said operating system in said encrypted format in said data storage medium passed through a transform function.