Patent ID: 7130426
Filing Date: 2006-10-31
Classification: G11B,H04L

Abstract:
1. A method for copy protection, comprising: generating a partially decrypted data unit, the partially decrypted data unit including two portions, one of the two portions is encrypted having a protection level different from the other of the two portions; and transferring the partially decrypted data unit to a target device for further decrypting based on information used in the step of generating the partially decrypted data unit; and further comprising the steps of: registering a computer with a data server; transferring encrypted data from the data server to the computer the computer generating the partially decrypted data unit in a first decryption unit of the computer; and using a second decryption unit of the target device to further decrypt the partially decrypted data unit based on the information used in the step of generating the partially decrypted data unit.