Data processing apparatus and data processing method

Abstract

A data processing system, recording device, data processing method and program providing medium are provided to execute authentication processing and content storing processing between apparatuses. Program localization is employed to restrict access to program content. A plurality of key blocks store key data for authentication processing. Key block designation information is set in a recorder/reproducer, which is configured for executing authentication processing with the recording device by designating a key block. The recorder/reproducer can set a key block for each product, model or the like. In addition, data stored according to a selected key block cannot be utilized in a recorder/reproducer in which a different key block is set. Furthermore, an encryption processing controlling section of a recording device executes control in accordance with a pre-defined setting sequence. Furthermore, an illegal instrument that has not completed the authentication processing can be prevented from utilizing program content.

1 . A data processing method in a data processing system including a recorder/reproducer and a recording device operable to transmit encryption data to each other, said data processing method comprising: 
 designating in said recorder/reproducer a selected key block out of a plurality of key blocks held by said recording device; and    executing authentication processing between said recorder/reproducer and said recording device based on key data stored in said selected key block.    
   
   
       2 . The data processing method according to  claim 1 , wherein each of said plurality of key blocks includes an authentication key for use in said authentication processing, and said authentication key of each of said plurality of key blocks is configured as distinct key data.  
   
   
       3 . The data processing method according to  claim 1 , wherein said authentication processing step includes designating said selected key block based on setting information held in a memory in said recorder/reproducer.  
   
   
       4 . The data processing method according to  claim 1 , further comprising: 
 storing a master key Mkake for a recording device authentication key in a memory in said recorder/reproducer; and    generating an authentication key Kake based on said master key Mkake for use in said authentication processing.    
   
   
       5 . The data processing method according to  claim 4 , wherein: 
 said recording device includes a memory for storing recording device identification information IDmem and each of said plurality of key blocks stores said authentication key Kake, which is distinct for each key block,    said data processing method further including:    executing encryption processing of said recording device identification information IDmem based on said master key Mkake to generate said authentication key Kake.    
   
   
       6 . The data processing method according to  claim 1 , wherein said selected key block is designated in accordance with key block designation information received from said recorder/reproducer.  
   
   
       7 . The data processing method according to  claim 1 , further comprising: 
 executing encryption processing in said recording device using said key data in said selected key block, wherein said selected key block is selected in accordance with key block designation information received from said recorder/reproducer, and said encryption processing is executed during data storing processing and during data transfer processing of content data in a data storing section of said recording device.    
   
   
       8 . The data processing method according to  claim 1 , wherein: 
 said recording device further includes a data storage section, and each of said plurality of key blocks of said recording device includes a storing key used in encryption processing of data stored in said data storage section;    said method further comprising:    executing key exchange processing of said storing key in said recording device; and    if a data utilization request that is encrypted by said storing key is received from outside said recording device, outputting said encryption data by a key different from said storing key to outside said recording device.    
   
   
       9 . A recording medium recorded with a computer program for executing data processing in a data processing system including a recorder/reproducer and a recording device operable to transmit encryption data to each other, said data processing comprising: 
 designating in said recorder/reproducer a selected key block out of a plurality of key blocks held by said recording device; and    executing authentication processing between said recorder/reproducer and said recording device based on key data stored in said selected key block.