Patent ID: 7231174
Filing Date: 2007-06-12
Classification: H04B,H04H,H04N,H04W

Abstract:
1. A contents distribution system comprising: transmission means for transmitting contents in a ciphered state via a satellite; at least one base station for receiving the ciphered contents from said satellite to accumulate the received contents; and a plurality of mobile stations each for communicating with corresponding one of said base stations via wireless to receive and reproduce the contents transmitted from said corresponding one of said base stations, wherein said transmission means serves to transmit decipher keys to said at least one base station via another route different from said satellite, wherein said base station stores each of the received ciphered contents together with its corresponding decipher key, and wherein said base station operates so as to certify each of said mobile stations, to decipher by using the stored decipher key the ciphered contents requested by the certified mobile station, and to re-cipher the deciphered contents by using a cipher key unique to the certified mobile station to transmit the re-ciphered contents to the certified mobile station.