Patent ID: 7639812
Filing Date: 2009-12-29
Classification: G11B,H04L

Abstract:
1. A method for re-encrypting digital content at a source device, the method comprising: receiving digital content from an external device, the digital content being encrypted using a first encryption algorithm in the external device; decrypting the received digital content; performing an addition operation by using a first source internal key and an identifier (ID), the first source internal key being associated with the source device, the ID being associated with at least one of a target device and a storage medium of the target device, and the target device being connected to the source device; generating a source encryption key based on an output of the addition operation and a second source internal key by using a second encryption algorithm, the second source internal key being generated at the source device; re-encrypting the decrypted digital content using the source encryption key; and transmitting the re-encrypted digital content without the source encryption key to the target device.