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Method and system of generation of dynamic encrypt key of encryption secure digital memory card (SD)

A dynamic key and encryption algorithm technology, applied in transmission systems and key distribution, can solve the problems of key increase, hidden danger of information leakage, and data security decline, and achieve the effect of increasing security.

Active Publication Date: 2013-04-24
JIANGSU ZHILIAN TIANDI TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this encryption method is that the possibility of the key being stolen will increase with the prolongation of the use time, and the security of the corresponding data will decrease, and there may be hidden dangers of leaking some important information.

Method used

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  • Method and system of generation of dynamic encrypt key of encryption secure digital memory card (SD)
  • Method and system of generation of dynamic encrypt key of encryption secure digital memory card (SD)
  • Method and system of generation of dynamic encrypt key of encryption secure digital memory card (SD)

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Embodiment Construction

[0022] In order to make the object, technical solution and technical effect of the present invention clearer, the present invention will be explained in detail below in conjunction with the accompanying drawings and through specific implementation methods.

[0023] The process of the first embodiment of the method for generating the dynamic key of the encrypted SD card of the present invention is as follows: figure 1 Shown:

[0024] Step S101: When a new dynamic key is needed, the client device installed on the client sends a dynamic key generation request command to the background server of the card issuer.

[0025] Step S102: The background server of the card issuer generates a random number, and uses an encryption algorithm to generate a dynamic key according to the random number, the MAC of the client and the current time.

[0026] Step S103: the client device obtains the dynamic key generated by the background server of the card issuer.

[0027] In the above solution, t...

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Abstract

The invention discloses a method and a system of generation of a dynamic encrypt key of an encryption secure digital memory card (SD). The method comprises the following steps: a client-side device installed on a client side sends a dynamic encrypt key generating request command to a card issuer side backstage server when a new dynamic encrypt key is needed; the card issuer side backstage server generates a random number and generates a dynamic encrypt key by means of the encryption algorithm according to the random number, a multiaction computer (MAC) on the client side and current time; and then the client-side device acquires the dynamic encrypt key generated by the card issuer side backstage server. According to the method and the system of the generation of the dynamic encrypt key of the encryption SD, dynamic update of the encrypt key is achieved, and safety of encryption is guaranteed.

Description

technical field [0001] The invention relates to the technical field of encryption, in particular to a method and system for generating a dynamic key for an encrypted SD card. Background technique [0002] Secure Digital Memory Card (Secure Digital Memory Card, referred to as SD card), is a new generation memory device based on semiconductor flash memory, which is widely used in portable devices, such as digital cameras, personal digital assistants (PDA) and multimedia player etc. The size of a postage stamp, the SD memory card weighs only 2 grams, but it has high memory capacity, fast data transfer rate and great mobility flexibility. [0003] As people pay more attention to information security, higher requirements are put forward for the security of data in the SD card. Encryption is a widely used method of information security. The commonly used encryption mechanisms are: symmetric encryption and asymmetric encryption. The so-called symmetric encryption means that the ...

Claims

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Application Information

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IPC IPC(8): H04L9/08H04L29/06
Inventor 钱志明周鸣翰赵华王侠斌徐欢成
Owner JIANGSU ZHILIAN TIANDI TECHNOLOGY CO LTD
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