Patent ID: 7310731
Filing Date: 2007-12-18
Classification: G06F,G06Q,G11B,H04L

Abstract:
1. A contents signal receiving device comprising: receiving means for receiving a contents signal from a first device, the contents signal being encrypted by a first key, and for receiving the first key from the first device, the first key being encrypted by a second key; storage means for storing the encrypted contents signal received by the receiving means; decoding means for decoding the encrypted contents signal stored in the storage means when an instruction to decode the encrypted contents signal stored in the storage means is given as user-designated information; identification information appending means for appending identification information to the contents signal decoded by the decoding means; transmission means for transmitting the first key encrypted by the second key to a second device that decrypts the first key; and decrypting means; wherein the receiving means receives the first key from the second device, the second device having encrypted the first key with a third key, and wherein the decrypting means decrypts the first key encrypted with the third key.