| 摘要 |
<P>PROBLEM TO BE SOLVED: To achieve such operability as conventional analog connection and to protect the copyright of contents without making a user conscious of the protection since, if the contents are transmitted/received by a digital signal bus, there is no quality deterioration so that the protection of the copyright becomes a problem and authentication processing is required but authentication processing requires much throughput and long processing time. <P>SOLUTION: The problem can be solved by performing authentication processing for copyright management between devices connected to a digital signal bus and sharing an encryption key between the devices when a device is powered on or connected to the digital signal bus, or when an input signal connected with the digital signal bus is selected. <P>COPYRIGHT: (C)2009,JPO&INPIT |
