Memory device capable of arbitrary setting recording area of secret data

Abstract

The invention provides a memory device which can set a recording area of ​​confidential data arbitrarily. The hard disk device has a data storage area (2000). The data storage area (2000) includes a user area (2100) and a non-user area (2200). The user area (2100) is composed of a normal data storage area (2110) for storing non-confidential data and a protected data storage area (2120) for storing confidential data. The non-user area (2200) is composed of a management data storage area (2210). The management data storage area (2210) stores the certificate invalidation list and the management table of confidential data, etc. The user area (2100) is assigned logical addresses 0~maxLBA, among which sLBA+1~maxLBA are allocated to the protected data storage area (2120). The area of ​​the protected data storage area (2120) is changed according to the change of sMAX by an external instruction.

Description

technical field [0001] The present invention relates to a data storage device capable of storing permission for decrypting and reproducing encrypted data obtained using a data distribution system for protecting the copyright of copied information. In particular, it relates to a data storage device capable of copyright protection of copied information in a system capable of multiple access. Background technique [0002] In recent years, with the advancement of digital communication networks such as the Internet, each user can easily access network information through personal terminals such as mobile phones. [0003] In such digital communication networks, information is transmitted as digital data. Therefore, for example, even if each user copies the music or video data transmitted in the above-mentioned digital communication network, there will be almost no degradation of sound quality and video quality due to copying, that is, data copying can be performed. [0004] Ther...

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Problems solved by technology

[0014] As a data storage device for storing image content, memory cards have problems such as small data storage capacity, slow data access speed and high unit price per bit, etc., which are not suitable for processing image data.

[0015] Moreover, with the increase in the capacity of data storage devices, the storage capacity allowed in data storage devices that store large-capacity content represented by video data and data storage devices that store music data and other content less, if compared with the storage capacity If the content is kept constant regardless of the content, the encrypted content data cannot be stored in the video content although there is room in the permitted area for storing the encrypted content data. In the music content, although there is room for the permitted area for storing the encrypted content data, it cannot be stored. license, therefore, there is a problem of not being able to remember new content

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