Content reception terminal and recording medium

A content reception method for use with a content reception terminal apparatus for writing a digital work received from an external distribution apparatus to a portable recording medium which has a storage area, the method comprising:

• a reception step for receiving an encrypted digital work encrypted using a content key and the content key from the distribution apparatus, the encrypted digital work belonging to one of a plurality of categories, and all encrypted digital works belonging to a same category being digital works made up of a same logical data structure,
• a distinguishing step for distinguishing a category to which a received encrypted work belongs,
• a key encryption step for encrypting the received content key using a key unique to the distinguished category, and generate the encrypted content key, and
• a writing step for writing the received encrypted digital work and the generated encrypted content key to an area assigned to the distinguished category in the storage area of the recording medium.

A computer-readable recording medium recording a content reception program for use with a computer for writing a digital work received from an external distribution apparatus to a portable recording medium which has a storage area, the content reception program comprising:

• a reception step for receiving an encrypted digital work encrypted using a content key and the content key from the distribution apparatus, the encrypted digital work belonging to one of a plurality of categories, and all encrypted digital works belonging to a same category being digital works made up of a same logical data structure,
• a distinguishing step for distinguishing a category to which a received encrypted work belongs,
• a key encryption step for encrypting the received content key using a key unique to the distinguished category, and generate the encrypted content key, and
• a writing step for writing the received encrypted digital work and the generated encrypted content key to an area assigned to the distinguished category in the storage area of the recording medium.

A content reception program for use with a computer for-writing a digital work received from an external distribution apparatus to a portable recording medium which has a storage area, comprising:

• a reception step for receiving an encrypted digital work encrypted using a content key and the content key from the distribution apparatus, the encrypted digital work belonging to one of a plurality of categories, and all encrypted digital works belonging to a same category being digital works made up of a same logical data structure,
• a distinguishing step for distinguishing a category to which a received encrypted work belongs,
• a key encryption step for encrypting the received content key using a key unique to the distinguished category, and generate the encrypted content key, and
• a writing step for writing the received encrypted digital work and the generated encrypted content key to an area assigned to the distinguished category in the storage area of the recording medium.