DIGITAL SIGNAL RECORDING AND REPRODUCING APPARATUS, AND DIGITAL SIGNAL RECORDING AND REPRODUCING METHOD

摘要

PROBLEM TO BE SOLVED: To protect the copyright of a content without letting users be aware of it by actualizing operability like conventional analog connection since when the content is transmitted or received through a digital signal bus, authentication processing is necessary so as to protect the copyright because of no deterioration in quality, and is large in processing amount and it takes time for the authentication processing. SOLUTION: The copyright of the content can be protected by performing the authentication processing for copyright management between digital processing devices connected to the digital signal bus and allowing those devices to share a key for encryption when the devices are powered on, when the devices are connected to the digital signal buses, and when input terminals connected to the digital signal bus are selected. COPYRIGHT: (C)2011,JPO&INPIT