Title:
記録媒体レンタルシステム
Document Type and Number:
Japanese Patent JP2005538486
Kind Code:
A
Abstract:
A storage-medium rental system includes a portable storage medium to be rented to the user, a portable semiconductor memory owned by the user, a rental-shop apparatus owned by the rental agent, and a reproduction apparatus owned by the user. The storage medium prestores encrypted content which is generated by encrypting digital work by using a content encryption key. The semiconductor memory has an area for securely storing a content decryption key. The rental-shop apparatus stores a content decryption key for decrypting the encrypted content. The rental-shop apparatus writes the content decryption key to the semiconductor memory. The reproduction apparatus securely reads the content decryption key from the semiconductor memory, reads the encrypted content from the storage medium, decrypts the encrypted content by using the content decryption key, and reproduces the decrypted content.
Inventors:
Motoji Omori
Kensei Minami
Masaya Yamamoto
Kensei Minami
Masaya Yamamoto
Application Number:
JP2004534569A
Publication Date:
December 15, 2005
Filing Date:
September 05, 2003
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
G06F12/14; G06F21/10; G06F21/60; G06F21/62; G06Q30/06; G10L19/00; G11B20/00; G11B20/10; H01L; (IPC1-7): G11B20/10; G06F12/14; G06F17/60; G10L19/00
Attorney, Agent or Firm:
Shiro Nakajima