US 6,889,208 B1Granted

Contents sale system

AssigneeVictor Company of Japan, Ltd.

InventorsYasuhisa Okabe, Yoshiaki Tanaka

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Abstract

In a contents sale system, original contents data are encrypted into encryption-resultant contents data in response to original playback key data. The original playback key data are encrypted into first encryption-resultant playback key data. The first encryption-resultant playback key data are encrypted into second encryption-resultant playback key data in response to an ID of a sale destination terminal apparatus. The encryption-resultant contents data and the second encryption-resultant playback key data are transmitted to the sale destination terminal apparatus. The sale destination terminal apparatus is enabled to decrypt the second encryption-resultant playback key data into the first encryption-resultant playback key data in response to the ID of the sale destination terminal apparatus. The sale destination terminal apparatus is enabled to decrypt the first encryption-resultant playback key data into the original playback key data. The sale destination terminal apparatus is enabled to decrypt the encryption-resultant contents data into the original contents data in response to the original playback key data.

Claims10

Dependent claims

In a contents sale system including a host apparatus, a sale source terminal apparatus, a sale destination terminal apparatus, and copy destination apparatus, a method comprising the steps of:

encrypting original contents data into encryption-resultant contents data in response to original playback key data by the host apparatus;
generating encryption key data on the basis of the original contents data by the host apparatus;
encrypting the original playback key data into first encryption-resultant playback key data using the encryption key data as encryption key by the host apparatus;
transmitting the encryption-resultant contents data and the first encryption-resultant playback key data to the sale source terminal apparatus by the host apparatus;
encrypting the first encryption-resultant playback key data into second encryption-resultant playback key data in response to an ID of the sale destination terminal apparatus by the sale source terminal apparatus;
transmitting the encryption-resultant contents data and the second encryption-resultant playback key data to the sale destination terminal apparatus by the sale source terminal apparatus;
enabling the sale destination terminal apparatus to decrypt the second encryption-resultant playback key data into the first encryption-resultant playback key data in response to the ID of the sale destination terminal apparatus;
enabling the sale destination terminal apparatus to decrypt the first encryption-resultant playback key data into the original playback key data;
enabling the sale destination terminal apparatus to decrypt the encryption-resultant contents data into the original contents data in response to the original playback key data;
encrypting the first encryption-resultant playback key data into third encryption-resultant playback key data in response to an ID of the copy destination terminal apparatus by the sale destination terminal apparatus;
and
transmitting the encryption-resultant contents data and the third encryption-resultant playback key data to the copy destination terminal apparatus by the sale destination terminal apparatus.

9 more elements

A contents sale system comprising a host apparatus, a sale source terminal apparatus, a sale destination terminal apparatus, and a copy destination apparatus;

wherein the host apparatus comprises means for encrypting original contents data into encryption-resultant contents data in response to original playback key data, means for generating encryption key data on the basis of the original contents data, means for encrypting the original playback key data into first encryption-resultant playback key data in response to the encryption key data, and means for transmitting the encryption-resultant contents data and the first encryption-resultant playback key data to the sale source terminal apparatus;
wherein the sale source terminal apparatus comprises means for encrypting the first encryption-resultant playback key data into second encryption-resultant playback key data in response to an ID of a sale destination terminal apparatus, and means for transmitting the encryption-resultant contents data and the second encryption-resultant playback key data to the sale destination terminal apparatus;
wherein the sale destination terminal apparatus comprises means for decrypting the second encryption-resultant playback key data into the first encryption-resultant playback key data in response to the ID of the sale destination terminal apparatus, means for decrypting the first encryption-resultant playback key data into the original playback key data, and means for decrypting the encryption-resultant contents data into the original contents data in response to the original playback key data;
and
wherein the sale destination terminal apparatus comprises means for encrypting the first encryption-resultant playback key data into third encryption-resultant playback key data in response to an ID of the copy destination terminal apparatus, and means for transmitting the encryption-resultant contents data and the third encryption-resultant playback key data to the copy destination terminal apparatus.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 09/521,773Filed 9 Mar 2000
Priority: JP 11-10866515 Apr 1999
Granted: 3 May 2005
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

H04L 12/40104
High-speed IEEE 1394 serial bus: security; Encryption; Content protection
G06Q 20/10
Payment architectures: specially adapted for electronic funds transfer [EFT] systems; specially adapted for home banking systems
G06Q 20/105
Specially adapted for electronic funds transfer [EFT] systems; specially adapted for home banking systems: involving programming of a portable…
G06Q 20/12
Payment architectures: specially adapted for electronic shopping systems