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 system, comprising: 
 a recording device having a data storing section for storing content data and a plurality of key blocks for storing key data applicable to authentication processing, said key data in each one of said plurality of key blocks being distinct to that key block; and    a recorder/reproducer operable to perform said authentication processing with said recording device, to designate a first key block out of said plurality of key blocks, and to execute said authentication processing with said recording device based on said key data stored in said first key block,    wherein transfer of said content data between said recorder/reproducer and said recording device is enabled when said authentication processing is successful.    
   
   
       2 . The data processing system according to  claim 1 , wherein said key data in each of said plurality of key blocks includes an authentication key.  
   
   
       3 . The data processing system according to  claim 1 , wherein: 
 said recorder/reproducer includes setting information in which one key block of said plurality of key blocks is capable of being applied to said authentication processing as a designated key block, said setting information being stored in a memory in said recorder/reproducer; and    when said authentication processing is performed between said recorder/reproducer and said recording device, said recorder/reproducer determines said designated key block based on said setting information.    
   
   
       4 . The data processing system according to  claim 3 , wherein said setting information is different for each of a plurality of product units.  
   
   
       5 . The data processing system according to  claim 1 , wherein: 
 said recorder/reproducer includes a memory for storing said key data; and    authentication of said key data stored in said memory is only established using said key data in a selected key block in said recording device.    
   
   
       6 . The data processing system according to  claim 1 , further comprising: 
 a memory in said recorder/reproducer;    a master key Mkake stored in said recorder/reproducer memory; and    an authentication key Kake that is generated based on said master key Mkake, wherein authentication of said authentication key Kake is only established in said authentication processing using said key data in a selected key block in said recorder/reproducer.    
   
   
       7 . The data processing system according to  claim 6 , further comprising: 
 a memory in said recording device;    a recording device identification information IDmem stored in said recording device; and    said recorder/reproducer is operable to generate said authentication key Kake by encryption processing of said recording device identification information IDmem based on said master key Mkake, and to perform said authentication processing with said selected key block of said recording device using said authentication key Kake;    wherein said authentication key Kake is a plurality of distinct authentication keys Kake each associated with one of said plurality of key blocks.    
   
   
       8 . The data processing system according to  claim 1 , wherein: 
 said recorder/reproducer includes a data storage section for storing storage data; and    each key block of said recording device includes: 
 recording device identifier information containing specific information about said recording device,  
 an authentication key adapted for use in said authentication processing,  
 a random number generation key adapted for use in said authentication processing, and  
 a storing key adapted for use in encryption processing of said storage data.  
   
   
   
       9 . The data processing system according to  claim 8 , wherein: 
 said storing key includes a plurality of distinct storing keys each stored in one of said plurality of key blocks, said plurality of distinct storing keys being capable of use in said encryption processing of said storage data; and    said recording device is operable to execute key exchange processing of said plurality of distinct storing keys, and, if a data utilization request is received by said recording device, said recording device is operable to output encryption data using a key that is different from said plurality of distinct storing keys.    
   
   
       10 . The data processing system according to  claim 1 , wherein said recording device further includes an encryption processing section operable to select said first key block in accordance with key block designation information received from said recorder/reproducer, and to execute said authentication processing with said recorder/reproducer using said key data in said first key block.  
   
   
       11 . The data processing system according to  claim 10 , wherein said encryption processing section of said recording device is operable to execute encryption processing using said key data in said first key block.  
   
   
       12 . The data processing system according to  claim 1 , further comprising a plurality of designatable key blocks in said recording device, at least one of said designatable key blocks being configured as a commonly designatable key block that is designatable in recorder/reproducers other than said recorder/reproducer.  
   
   
       13 . A recording device, comprising: 
 a data storage section for storing content data transferable to and from an external apparatus; and    a plurality of key blocks for storing key data, said key data being applicable to authentication processing between said recording device and said external apparatus, wherein said key data is operable to store information for each of said plurality of key blocks.    
   
   
       14 . The recording device according to  claim 13 , wherein: 
 each of said plurality of key blocks includes a unique authentication key for use with said authentication processing; and    each unique authentication key is configured as said key data.    
   
   
       15 . The recording device according to  claim 13 , further comprising: 
 a memory for storing recording device identification information IDmem; and    a distinct authentication key Kake for each of said plurality of key blocks, each of said distinct authentication keys Kake being stored in one of said plurality of key blocks.    
   
   
       16 . The recording device according to  claim 13 , wherein each of said plurality of key blocks includes: 
 recording device identifier information containing specific information about said recording device;    an authentication key adapted for use in said authentication processing;    a random number generation key adapted for use in said authentication processing; and    a storing key adapted for use in encryption processing of storage data in said data storage section.    
   
   
       17 . The recording device according to  claim 16 , wherein: 
 said storing key includes distinct key data that is different for each of said plurality of key blocks, said storing key being usable in said encryption processing; and    said recording device is operable to execute key exchange processing of said storing key, and, if a data utilization request is received by said recording device, said recording device is operable to output encryption data using a key that is different from said storing key.    
   
   
       18 . The recording device according to  claim 13 , further including an encryption processing section operable to select a specific key block from said plurality of key blocks in accordance with key block designation information received from said external apparatus, and to execute said authentication processing using said key data in said specific key block.  
   
   
       19 . The recording device according to  claim 18 , wherein said encryption processing section is operable to execute encryption processing using said key data in said specific key block.