Abstract: An encrypted content and its encryption key under a copy right use condition of prohibiting a copy by the device having received a content are stored, and the encrypted content is copy-transferred with another device through the network, and at the same time, the encryption key is transferred through the network, so that it is stored in either one of the devices. Even when a high definition television broadcast signal received with a copy-once taken as a copy right use condition is recorded, an access flag that controls the presence or absence of the reproduction of the broadcast content for each broadcast content is provided. When an original broadcast content is transcoded into a low resolution, and is transfer to another device, its access flag is turned on, thereby making the reproduction possible.

Abstract: An encrypted content and its encryption key under a copy right use condition of prohibiting a copy by the device having received a content are stored, and the encrypted content is copy-transferred with another device through the network, and at the same time, the encryption key is transferred through the network, so that it is stored in either one of the devices. Even when a high definition television broadcast signal received with a copy-once taken as a copy right use condition is recorded, an access flag that controls the presence or absence of the reproduction of the broadcast content for each broadcast content is provided. When an original broadcast content is transcoded into a low resolution, and is transfer to another device, its access flag is turned on, thereby making the reproduction possible.

Abstract: An encrypted content and its encryption key under a copy right use condition of prohibiting a copy by the device having received a content are stored, and the encrypted content is copy-transferred with another device through the network, and at the same time, the encryption key is transferred through the network, so that it is stored in either one of the devices. Even when a high definition television broadcast signal received with a copy-once taken as a copy right use condition is recorded, an access flag that controls the presence or absence of the reproduction of the broadcast content for each broadcast content is provided. When an original broadcast content is transcoded into a low resolution, and is transfer to another device, its access flag is turned on, thereby making the reproduction possible.

Abstract: An encrypted content and its encryption key under a copy right use condition of prohibiting a copy by the device having received a content are stored, and the encrypted content is copy-transferred with another device through the network, and at the same time, the encryption key is transferred through the network, so that it is stored in either one of the devices. Even when a high definition television broadcast signal received with a copy-once taken as a copy right use condition is recorded, an access flag that controls the presence or absence of the reproduction of the broadcast content for each broadcast content is provided. When an original broadcast content is transcoded into a low resolution, and is transfer to another device, its access flag is turned on, thereby making the reproduction possible.

Abstract: An information processing system includes a volatile storage unit stored with save target information to be saved when transiting to a sleep state in which a consumption of electric power can be temporarily restrained, a nonvolatile storage unit of saving the save target information when transiting the sleep state, a nonvolatile storage medium of storing the save target information remaining unstorable in the nonvolatile storage unit, and a control unit of storing the nonvolatile storage unit with the save target information and division-storing the nonvolatile storage medium with the save target information exceeding a storage capacity of the nonvolatile storage unit.

Abstract: A method of controlling a computer managing user's schedule is disclosed. The method includes the steps of: setting a first time; determining whether present time is within the first time before a going-out time at which the user is to go out; and setting the computer at a going-out mode in response to the determination. The method may further include the steps of: setting a second time; determining whether the present time is within the second time before the going-out time; controlling a power supply of the computer; wherein after the computer is set in the going-out mode, the power supply is turned off in response to the determination. The method enables the computer to control the power supply based on the state of the user and the user's schedule managed thereby.

Abstract: An information processing system includes a volatile storage unit stored with save target information to be saved when transiting to a sleep state in which a consumption of electric power can be temporarily restrained, a nonvolatile storage unit of saving the save target information when transiting the sleep state, a nonvolatile storage medium of storing the save target information remaining unstorable in the nonvolatile storage unit, and a control unit of storing the nonvolatile storage unit with the save target information and division-storing the nonvolatile storage medium with the save target information exceeding a storage capacity of the nonvolatile storage unit.