Disk system and medium with contents play-back restriction mechanism

Abstract

A disk system has contents play-back restriction mechanism. A contents storage section, which contents received from a regular server are stored in. A capacitor charged with power supplied from the server. A volatile memory backed up by the capacitor and stores data necessary for the play-back of the contents received from the server. A controller for controlling the contents storage section and the volatile memory for reading and writing data when supplied with power from a regular player or the server.

What is claimed is:  
     
         1 . A disk system with contents play-back restriction mechanism comprising a contents storage section, which contents received from a regular server are stored in, a capacitor charged with power supplied from the server, a volatile memory backed up by the capacitor and stores data necessary for the play-back of the contents received from the server, and a controller for controlling the contents storage section and the volatile memory for reading and writing data when supplied with power from a regular player or the server.  
     
     
         2 . A disk system with contents play-back restriction mechanism comprising a contents storage section, which contents received from a regular server are stored in, a battery, a timer backed up by the battery, a value corresponding to rental time data of the contents being set in the timer from the server, a volatile memory backed up by the battery, data necessary for the play-back of the contents being stored in the volatile memory from the server and deleted in correspondence to the output of the timer, and a controller for controlling the contents storage section, the timer and the volatile memory for reading data and writing when receiving power supplied form a regular player or the server.  
     
     
         3 . A disk system with contents play-back restriction mechanism comprising a contents storage section, which contents received form a regular server are stored in, a capacitor charged by power supplied form the server, a timer backed up by the capacitor, data necessary for the play-back of the contents being stored in the timer from the server and deleted in correspondence to the output of the timer of, and a controller for controlling the contents storage section, the timer and the volatile memory for reading and writing data when receiving power from a regular player or the server.  
     
     
         4 . The disk system with contents play-back restriction mechanism according to one of  claims 1  to  3 , wherein the contents stored in the contents storage section have been ciphered and the data necessary for the play-back of the contents includes a deciphering key for deciphering the contents.  
     
     
         5 . The disk system with contents play-back restriction mechanism according to one of  claims 1  to  3 , wherein the data necessary for the play-back of the contents includes data of a procedure of read-out control of the contents storage section.  
     
     
         6 . The disk system with contents play-back restriction mechanism according to one of  claims 1  to  5 , which includes a mechanism having a switch provided on power supply line led to the volatile memory such that, when unfair accessing is performed, the switch is turned off to delete data having been held in the volatile memory.  
     
     
         7 . The disk system with contents play-back restriction mechanism comprising a data storage section, which ciphered contents and a deciphering key for deciphering the contents are stored in from a regular server, a battery, a timer backed up by the battery, a value corresponding to rental time data of the contents being set in the timer from the server, and a controller for controlling the data storage section and the time for reading and writing data when receiving power supplied form a regular player or the server and deleting the deciphering key stored in the data storage section in correspondence to the output of the timer.  
     
     
         8 . A disk system with contents play-back restriction mechanism comprising a data storage section, which ciphered contents and a deciphering key for deciphering the contents are stored in from a regular server, a capacitor charged with power from the server, a timer backed up by the capacitor, a value corresponding to rental time data of the contents being set in the timer from the server, and a controller for controlling the data storage section and the timer for reading and writing data and deleting the deciphering key stored the data storage section in correspondence to the output of the timer.  
     
     
         9 . The disk system with contents play-back restriction mechanism according to one of  claims 1  to  8 , wherein the connection of the disk system to the server or the player is confirmed by the outer shape of an interface connected to the server or the player or by the controller.  
     
     
         10 . A disk system with contents play-back restriction mechanism comprising a contents storage section, which contents are written and stored in by a regular server and read out from by a regular player, a capacitor charged with power from the server, a volatile memory backed up by the capacitor, data necessary for the play-back of the contents being stored in the volatile memory from the server, and a controller for controlling the volatile memory for reading and writing data when receiving power supplied from a regular player or the server.  
     
     
         11 . A medium with contents play-back restriction mechanism comprising, which contents are written and stored in by a regular server and read out from by a regular layer, a battery, a timer backed up by the battery, a value corresponding to rental time data of the contents being set in the timer from the server, a volatile memory, which data necessary for the play-back of the contents is stored in from the server and deleted in correspondence to the output of the timer, and a controller for controlling the timer and the volatile memory for reading and writing data when receiving power supplied from a regular player or the server.  
     
     
         12 . A medium with contents play-back restriction mechanism comprising a contents storage section, which contents are written and stored in by a regular server and read out from by a regular player, a capacitor charged with power from the server, a timer backed up by the capacitor, a value corresponding to rental time data of the contents being set in the timer from the server, a volatile memory backed up by the capacitor, data necessary for the play-back of the contents being stored in the volatile memory from the server and deleted in correspondence to the output of the timer, and a controller controlling the timer and the volatile memory for reading and writing data when receiving power supplied from a regular player or the server.  
     
     
         13 . The medium with contents play-back restriction mechanism according to one of  claims 10  to  12 , wherein the contents stored in the contents storage section have been ciphered and the data necessary for the play-back of the contents includes a deciphering key for deciphering the contents.  
     
     
         14 . The medium with contents play-back restriction mechanism according to one of  claims 10  to  12 , wherein the data necessary for the play-back of the contents includes data of a procedure of read-out control of the contents storage section.  
     
     
         15 . The disk system with contents play-back restriction mechanism according to one of  claims 10  to  14 , which includes a mechanism having a switch provided on power supply line led to the volatile memory such that, when unfair accessing is performed, the switch is turned off to delete data having been held in the volatile memory.  
     
     
         16 . A disk system with contents play-back restriction mechanism comprising a data storage section, which ciphered contents and a deciphering key for deciphering the contents are written and stored in by a regular server and read out by a regular player, a battery, a timer backed by the battery, a value corresponding to the rental time data of the contents being set in the timer, and a controller for controlling the timer for reading and writing data when receiving power supplied from the player or the server, wherein the deciphering key stored in the data storage section is deleted by the player in correspondence to the output of the timer.  
     
     
         17 . A disk system with contents play-back restriction mechanism comprising a data storage section, which ciphered contents and a deciphering key for deciphering the contents are written and stored by a regular server and read out by a regular player, a timer backed by the capacitor, a value corresponding to rental time data of the contents being set in the timer from the from the server, and a controller for controlling the timer for reading and writing data when receiving power supplied from the player or the server, wherein the deciphering key stored in the data storage section is deleted by the player in correspondence to the output of the timer.  
     
     
         18 . The disk system with contents play-back restriction mechanism according to one of  claims 10  to  15 , wherein the connection of the disk system to the server or the player is confirmed by the outer shape of an interface connected to the server or the player or by the controller.