US 7,120,604 B2 · Method of controlling digital content distribution, a method of reproducing digital content, and an apparatus using the same

Abstract

A digital content distribution control method, a digital content reproducing method, and a digital content reproducing apparatus. The digital content distributing side manipulates digital content by encrypting and compressing the same, transmits the manipulated digital content, an encrypted content key, and encrypted billing information to the other party of communication, and distributes to digital content proprietors the digital content usage fees collected based on digital content usage information received from the other party. On the other hand, the digital content reproducing side decrypts, in a single portable terminal, the manipulated digital content by the digital key and decompresses the decrypted digital content for reproduction. At the same time, the reproducing side decrements the billing information according to the use of the content and generates content usage information to be transmitted to the content distributing side. The digital content reproducing apparatus associated with the present invention is made portable to solve the above-mentioned problems.

Claims10

Dependent claims

A method for use in an information processing apparatus for receiving distributed contents and transmitting the contents to a portable reproduction apparatus, comprising the steps of:

transmitting a request from a user for the content including content specifying information to a content server;
receiving an encrypted content transmitted from the content server in response to the request from the user for the content;
storing the encrypted content received in the step of receiving;
at a time following storing the encrypted content, transmitting a request for a content key and a use condition to an administration center when the user wishes to reproduce the stored content;
receiving the content key and the use condition transmitted from the administration center in response to the requests for the content key and the use condition;
transmitting the encrypted content to the portable reproduction apparatus, for reproduction threreby wherein the portable reproduction apparatus is detachable from the information processing apparatus;
encrypting the content key and the use condition with a session key shared with the portable reproduction apparatus;
and
transmitting the content key and the use condition encrypted with the session key to the portable reproduction apparatus.

6 more elements

An information processing apparatus for receiving distributed contents and transmitting the contents to a portable reproduction apparatus, comprising:

a transceiver for transmitting a request from a user for the content including content specifying information to a content server, for receiving an encrypted content transmitted from the content server in response to the request from the user for the content, for storing the encrypted content for subsequent reproduction by the portable reproduction apparatus, for transmitting a request for a content key and a use condition to an administration center at a time following storing the encrypted content when the user wishes to reproduce the content, for receiving the content key and the use condition transmitted from the administration center in response to the request for the content key and the use condition, and for transmitting the encrypted content to the portable reproduction apparatus, wherein the reproduction apparatus is detachable from the information processing apparatus;
and
encrypting means for encrypting the content key and the use condition with a session key shared with the portable reproduction apparatus, wherein the content key and the use condition encrypted with the session key are transmitted by the transceiver to the portable reproduction apparatus.

Dependencies are inferred from the claim text.

Method of controlling digital content distribution, a method of reproducing digital content, and an apparatus using the same

Life of this patent

Method of controlling digital content distribution, a method of reproducing digital content, and an apparatus using the same

Life of this patent

Abstract

Claims10