Content receiving terminal, content exporting and reproducing method, and recording medium

A content exporting and reproducing method in a content receiving terminal configured to (i) encrypt a content that is received from a content server through a communication network, based on an acquired export license, by using an encryption key for the content, and (ii) export the encrypted content directly to a portable recording medium, the content exporting and reproducing method comprising:

• a content export step of (i) encrypting a decryption key for the content, that is used for decrypting the encrypted content, by using an encryption key for the decryption key for the content, (ii) recording the encrypted decryption key for the content in the portable recording medium, and (iii) exporting the encrypted content directly and sequentially to the portable recording medium;
• and
• a content reproduction step of (i) reading out the encrypted decryption key for the content from the portable recording medium, (ii) decrypting the encrypted decryption key for the content by using a decryption key for decrypting the encrypted decryption key for the content, (iii) reading out the encrypted content that has been exported to the portable recording medium, and (iv) decrypting the read-out encrypted content that is read out from the portable recording medium, by using the decrypted decryption key for the content to reproduce the content,
• wherein the content receiving terminal is further configured to (i) uniquely generate the decryption key for decrypting the encrypted decryption key for the content, the encrypted decryption key being able to be decrypted only by the content receiving terminal, and (ii) store the decryption key for decrypting the encrypted decryption key for the content in the content receiving terminal during the process of exporting the encrypted content directly and sequentially to the portable recording medium,
• wherein the content exporting and reproducing method further comprises steps of:
• encrypting the decryption key for decrypting the encrypted decryption key for the content by using another encryption key;
• and
• when the decryption key for decrypting the encrypted decryption key for the content is encrypted, recording the encrypted decryption key for decrypting the encrypted decryption key for the content in the portable recording medium, and
• wherein the content receiving terminal uniquely generates the other encryption key for encrypting the decryption key for decrypting the encrypted decryption key for the content.