Patent attributes
Method and apparatus for content protection using one-way buffers. In one embodiment, the method includes storage of content decrypted by a host processor within a reserved range of memory. In one embodiment, a peripheral device requires the host processor to decrypt the received content for playback by the peripheral device. The decrypted content is stored within a reserved range of memory that is not accessible by malicious software. Hence, content is transferred from the reserved range of memory to a device driver of the peripheral device. In one embodiment, access to the reserved range of memory consists of write-only access by the host processor and read-only access by the peripheral device. In one embodiment, prior to storage of the content within the reserved range of memory, the content is re-encrypted prior to storage and decryption prior to transfer to the peripheral device. Other embodiments are described and claimed.
