A device and method for decrypting re-encrypted digital contents are discussed. According to an embodiment, the method includes receiving the re-encrypted digital content without a source encryption key from a source device connected to the target device, wherein the re-encrypted digital content is generated...http://www.google.de/patents/US7643635?utm_source=gb-gplus-sharePatent US7643635 - Digital content decrypting apparatus and operating method thereof
