Method and device for encrypting data in ATA memory device with USB interface

A USB interface and storage device technology, applied in the field of information security, to achieve the effect of fast encryption, security assurance, and fast encryption and decryption

CN101551784AInactive Publication Date: 2009-10-07NORTHWESTERN POLYTECHNICAL UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2009-10-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method and a device for encrypting data in an ATA memory device with a USB interface. Based on the conventional ATA memory device, the device for encrypting data consisting of a user card and a hardware encryption board card encrypts data transmitted between the memory device and a USB host, thereby achieving the aim for encrypting the data in the memory device. The device for encrypting data consists of a user secret key card and a hardware encryption bard card; and the hardware encryption bard card consist of a USB transreceiver, a USB equipment controller, a control endpoint buffer area, a batch endpoint buffer area, a main controller, an encryption-decryption module, an ATA controller, a secret key acquisition module and a safe access module. The invention has the advantages that the secret key is directly read by the encryption device, without using a computer connected with the memory, thereby ensuring high security; in addition, the data can be encrypted and decrypted at high speed without using an operation system; and moreover, the secret key is stored in a special hardware secret key memory card, and the secret key and the protected data are independently stored, thereby ensuring the security of the data.
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Description

technical field

[0001] The invention relates to a method and device for encrypting data in an ATA storage device with a USB interface, which is used to protect the confidentiality of the data in the storage device and can prohibit unauthorized access to the storage device, belonging to the field of information security. Background technique

[0002] At present, the mobile storage device based on the USB interface has won the favor of many users because it can provide users with a large storage space, and has the characteristics of easy portability, fast speed and plug-and-play, and has become a common device for users to exchange data. . Among them, the ATA type storage device based on the USB interface is the most commonly used type.

[0003] However, if the data on the mobile storage device is stored in clear text, it is very easy to be obtained by illegal users. Therefore, it is necessary to limit the access of illegal users and prevent the leaking problems caused by th...

Examples

Embodiment Construction

[0037] The present invention will be further described now in conjunction with accompanying drawing:

[0038] The device implementing the method is composed of a user key card and a hardware encryption board.

[0039] The user key card is a smart card with secure computing function, follows the serial communication protocol, and uses the SIC04 smart card of Minghua Aohan Company; stores the authentication key Kua representing the identity of the user, and the authentication key for identifying the identity of the reader of the user key card The key Kea and the working key material Dk are kept by the user and inserted into the corresponding interface of the hardware encryption board when needed; they are used to identify the legitimacy of the hardware encryption board, to indicate their identity, and to submit to the legitimate hardware encryption board Provide key material.

[0040] The hardware encryption board stores the authentication key Kea representing its own identity ...