Data flow encryption SD card

A data flow and data technology, applied in the direction of digital data protection, recording carriers used by machines, instruments, etc., can solve the problems of slow encryption and decryption speed, low security, information leakage, etc., and achieve fast encryption and decryption speed and safe use , the effect of large storage capacity

CN103903042AActive Publication Date: 2014-07-02HANGZHOU SYNOCHIP DATA SECURITY TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2014-07-02

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Abstract

A data flow encryption SD card comprises a security chip. An SD memory card slave interface, various public key and private key encryption and decryption algorithms, various grouped data encryption and decryption algorithms, an embedded memorizer and an SD or eMMC main control interface are integrated on the security chip. The security chip is connected with an SD interface for being connected with an SD host through the SD memory card slave interface. The SD or eMMC main control interface is connected with a standard SD / eMMC controller for operating a nonvolatile memorizer. The standard SD / eMMC controller is connected with the nonvolatile memorizer for achieving the SD card large-capacity memory function through a NandFlash interface. The data flow encryption SD card has the advantages of being high in encryption and decryption speed, safe to use, low in cost and large in memory capacity.
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Description

technical field

[0001] The invention relates to a data stream encryption SD card. Background technique

[0002] The SD card is a memory card standard and is widely used in portable devices, especially in mobile phones in the form of microSD packaging.

[0003] With the continuous expansion of mobile Internet users and the rapid development of mobile Internet communication services, mobile financial services, and cloud storage markets, the requirements for information security are also increasing. The SD card with stream encryption function can well solve the security of mobile communication data, encrypted storage of cloud data and financial authentication business. For example, at present, the data stored in the mobile phone cloud is usually transmitted in clear text on the network, which is easy to leak. Even if some are encrypted, the key is stored on the mobile phone, which is easy to be attacked. The stream encryption SD card can save the private key in the SD card, d...

Examples

Embodiment Construction

[0032] The present invention will be further described below in conjunction with specific examples, but the present invention is not limited to these specific implementations. Those skilled in the art will realize that the present invention covers all alternatives, modifications and equivalents as may be included within the scope of the claims.

[0033] refer to image 3 , Figure 4 , a data stream encryption SD card, including a security chip, the security chip 1 is integrated with an SD memory card slave interface, a variety of public and private key encryption and decryption algorithms and packet data encryption and decryption algorithms, embedded memory, SD or eMMC master control Interface, the security chip 1 is connected to the SD interface used to connect with the SD host through the SD memory card slave interface, and its SD or eMMC master control interface is connected to the standard SD / eMMC controller used to operate the non-volatile memory 2 connections;

[0034...