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I/O memory device capable of restoring enciphered data correctly

A technology for input/output and storage devices, which is applied in the direction of input/output to record carriers, information storage, data recording, etc., and can solve problems such as inability to ensure safety

Inactive Publication Date: 2003-07-30
SANYO ELECTRIC CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a danger that the license agreement is sent repeatedly, causing a problem that security cannot be ensured

Method used

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  • I/O memory device capable of restoring enciphered data correctly
  • I/O memory device capable of restoring enciphered data correctly
  • I/O memory device capable of restoring enciphered data correctly

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0053] specific implementation plan

[0054] Embodiments of the present invention will be described in detail below with reference to the drawings. In addition, the same or corresponding parts in the drawings are assigned the same symbols, and their repeated descriptions are omitted.

[0055] FIG. 1 is a conceptual schematic diagram showing the overall configuration of a data distribution system in which a storage device acquires encrypted content data and a license for decrypting the encrypted content data according to the present invention.

[0056] Although the structure of the data distribution system for distributing music data to the user's terminal device, which is the memory card 40 on the mobile phone, through the mobile phone network will be described as an example below, it can be seen in the following description However, the present invention is not limited to this case, and can also be applied to the case of distributing content data of other publications, such ...

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PUM

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Abstract

A log region of a memory card includes a plurality of log entries and a plurality of administration information storage units. Each of the plurality of log entries includes a license ID region, a Ks2w region, a status region and a KPcmy region. The status region includes a ST1 region and a ST2 region to store the communication status. The license ID region stores a license ID. The Ks2w region stores a session key. The KPcmy region stores a class public encryption key of a memory card. The administration information storage unit stores the last record sequence number corresponding to the log entry storing history information of the latest communication.

Description

technical field [0001] The present invention relates to a storage device for storing a license for decoding or playing encrypted data obtained through a data delivery system capable of copyright protection of copied information, in particular to a storage device capable of multiple access. A storage device in a device that can copyright-protect copied information. Background technique [0002] In recent years, with the advancement of digital information communication networks such as the Internet, each user can easily access network information using a personal terminal such as a mobile phone. [0003] In such a digital information communication network, information is transmitted by digital signals. Therefore, for example, even if music data and video data transmitted in the above-mentioned information communication network are copied by each user, the data can basically be copied without loss of sound quality and image quality. [0004] Therefore, when content with autho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F12/14G06F3/06G06F21/10G06F21/60G06F21/62G11B20/00
CPCG11B20/0021G11B20/00855G06F2221/2101G11B20/00086G11B20/00543G06F2221/0797G11B20/00224G11B20/00731G11B20/00847G06F21/10G11B20/00536G06F21/109H04L12/22
Inventor 堀吉宏平井达哉
Owner SANYO ELECTRIC CO LTD