Optical Media Recording Device for Protecting Device Keys and Related Method
AssigneeCyberlink Corp.
InventorChun-Wei Chang
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Abstract
To protect device keys, an optical media recording device capable of performing AACS encryption on data does not have any device keys, and the optical media recording device performs AACS encryption by activating recording software stored in a memory the optical media recording device, and utilizing a pre-calculated media key stored in the memory of the optical media recording device to perform AACS encryption on the data.
Claims21
A method of performing AACS encryption in an optical media recording device, the method comprising:
- activating recording software having no device keys stored in the optical media recording device;
- and
- the recording software utilizing a pre-calculated media key stored in a memory of the optical media recording device to perform AACS encryption of data.
A method for recording encrypted content in an optical storage medium, the method comprising:
- receiving content;
- receiving a pre-calculated media key;
- encrypting the content using a title key;
- encrypting the title key using the pre-calculated media key;
- and
- recording the encrypted content and the encrypted title key into the optical storage medium.
An optical media recording device having no device keys for performing AACS encryption of data, the optical media recording device comprising:
- a non-volatile memory including a media key storage region storing a pre-calculated media key, and an AACS encryption program code region storing program code for performing AACS encryption based on the pre-calculated media key;
- and
- a processor for executing the program code to generate AACS-encrypted data.
Dependencies are inferred from the claim text.