| 摘要 |
An object of this invention is to protect the right of a content holder without any necessity of a special storage medium incorporating a copyright protecting mechanism when the content holder does not coincide with a content creator. Information for encryption key generation is input. An encryption key is generated from the information for encryption key generation. Encryption key verification data is acquired from a storage medium, and the validity of the generated encryption key is authenticated based on the verification data. Generated data is encrypted by using the encryption key whose validity is authenticated by the authentication. The encrypted data is stored in the storage medium. |
