Patent ID: 8261360

Claim:
A content distributing system for distributing content, comprising: an encrypting apparatus including a hardware processor configured to receive an encryption selection and to encrypt a plurality of objects constituting content by generating a content key for all of the plurality of objects, determining an amount of object keys based on the encryption selection, the encryption selection including encrypting based on an object ID of each object, encrypting based on an object ID of a portion of objects and based on a fixed value for remaining objects, encrypting based on an object type, encrypting based on a fixed value, and encrypting based on embedded key generation data, generating, by a processor, a plurality of object keys for each of the objects based on the content key and key generation data, the key generation data including different types of data from a respective object for which the object key is generated, the type of key generation data used when generating the plurality of object keys being based on the amount of object keys, the content representing at least one of a book and a magazine, each of the objects representing a page of the at least one of the book and the magazine, and encrypting content data of the plurality of objects with a respective object key to generate encrypted content; a content offering apparatus including a hardware processor configured to offer the encrypted content to a content reproducing apparatus; a license information offering apparatus including a hardware processor configured to offer license information having information necessary to decrypt said encrypted content; and a content reproducing apparatus including a hardware processor configured to acquire said encrypted content from said content offering apparatus, and to decrypt and reproduce the acquired content via said license information acquired from said license offering apparatus.