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.

Description

CROSS REFERENCE TO RELATED APPLICATIONS [0001] This application is a divisional of U.S. application Ser. No. 10 / 412,771, filed on Apr. 11, 2006, which is a continuation of U.S. patent application Ser. No. 09 / 937,120, filed Dec. 17, 2001, the entire disclosures of which are hereby incorporated by reference herein.BACKGROUND OF THE INVENTION [0002] The present invention relates to a data processing apparatus, and a data processing method, and more particularly, to a method and apparatus for verifying that data constituting a data content is valid, that is, checking whether or not the data has been tampered with; as well as a method for imparting verification values; and also to an apparatus and a method capable of enhancing security by generating individual keys necessary for encryption processing using master keys corresponding to their respective individual keys. Moreover the present invention provides a configuration that eliminates illegal usage of content data. More specifically,...

AI Technical Summary

Benefits of technology

The present invention provides a data processing apparatus, method, and content data generating method that can efficiently verify the validity of data and execute reproduction processing for compressed data. The invention also excludes illegal reproducers and provides security in encryption processing. The invention also provides various data structures for different types of content data to easily utilize and apply decryption processing in high-speed processing. The invention also provides a configuration for efficiently executing reproduction processing of compressed data. Overall, the invention enhances security and efficiency in data processing and content data generation.

Problems solved by technology

However, executing these kinds of encryption processing requires common secret information.

Therefore, in the case where key data (which is shared secret information), is leaked from either of the two apparatuses, the content encryption data (using the shared key information) can also be decrypted by a third party who has no license, thus allowing illegal use of contents.

Leakage of keys, therefore, has consequences that threat the entire system.

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