Information processing system, information processing device, information processing method and program

An information processing device comprising:

• a communication unit performing communication with a content providing server;
• and
• a data processing unit transmitting content selection information including content identifiers as identifiers of encrypted contents respectively encrypted by different encryption keys and range information indicating data areas of range data which is configuration data of respective encrypted contents to the content providing server, receiving an encrypted content formed by combining range data as partial data of the encrypted contents specified by the content identifiers and the range information from the content providing server and storing the content in a storage unit.

An information processing method executed in an information processing device which has a storage unit storing encrypted contents #1 to #n respectively encrypted by different plural encryption keys, the method comprising:

• receiving content identifiers as identifiers of encrypted contents and range information indicating data areas of range data which is configuration data of respective encrypted contents from a client through a communication unit;
• and
• selecting an encrypted content formed by combining range data as partial data of the encrypted contents specified by the content identifiers and the range information as data provided to the client by a data processing unit.

An information processing method executed in an information processing device, comprising:

• generating and providing content selection information applied for acquisition of contents in response to a content request from a client executing acquisition and reproduction of contents by a data processing unit,
• wherein the data processing is processing of generating different content selection information having different content identifiers and range information in each processing of providing the content selection information with respect to the client and provides the information to the client.

An information processing method executed in an information processing device, comprising:

• transmitting content selection information including content identifiers as identifiers of encrypted contents respectively encrypted by different encryption keys and range information indicating data areas of range data which is configuration data of respective encrypted contents to a content providing server;
• and
• receiving an encrypted content formed by combining range data as partial data of the encrypted contents specified by the content identifiers and the range information from the content providing server and storing the content in a storage unit.

A program allowing an information processing device to execute information processing which has a storage unit storing encrypted contents #1 to #n respectively encrypted by different plural encryption keys, comprising:

• allowing the information processing device to receive content identifiers as identifiers of encrypted contents and range information indicating data areas of range data which is configuration data of respective encrypted contents from a client through a communication unit;
• and
• allowing a data processing unit to select an encrypted content formed by combining range data as partial data of the encrypted contents specified by the content identifiers and the range information as data provided to the client.

A program allowing an information processing device to execute information processing, comprising:

• allowing a data processing unit to generate and provide content selection information applied for acquisition of contents in response to a content request from a client executing acquisition and reproduction of contents,
• wherein the data processing is processing of generating different content selection information having different content identifiers and range information in each processing of providing the content selection information with respect to the client and provides the information to the client.

A program allowing an information processing device to execute information processing, comprising:

• allowing the information processing device to transmit content selection information including content identifiers as identifiers of encrypted contents respectively encrypted by different encryption keys and range information indicating data areas of range data which is configuration data of respective encrypted contents to a content providing server;
• and
• allowing the information processing device to receive an encrypted content formed by combining range data as partial data of the encrypted contents specified by the content identifiers and the range information from the content providing server and to store the content in a storage unit.