System and method for realizing public key infrastructure (PKI) application by audio interface switching over universal serial bus (USB) protocol equipment

An audio interface and protocol technology, applied in the field of PKI (public key infrastructure) digital certificate application system

Inactive Publication Date: 2012-04-11
CHINA FINANCIAL CERTIFICATION AUTHORITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The SD card and Sim card patch storage method is to store the private key and public key certificate of the digital certificate on the corresponding hardware carrier. When using the private key encryption operation is completed in the SD card or Sim card patch hardware device, but due to The SD c

Method used

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  • System and method for realizing public key infrastructure (PKI) application by audio interface switching over universal serial bus (USB) protocol equipment
  • System and method for realizing public key infrastructure (PKI) application by audio interface switching over universal serial bus (USB) protocol equipment
  • System and method for realizing public key infrastructure (PKI) application by audio interface switching over universal serial bus (USB) protocol equipment

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Embodiment Construction

[0040] The main realization schematic diagram of the present invention is as figure 1 shown. The method of the present invention adopts a 3.5mm or 2.5mm earphone plug as the hardware connection module of the audio interface of the mobile device, and the hardware connection module of the audio interface of the mobile device may include an audio line part. The transfer device is used as the supporting device for the communication between the mobile device and the UsbKey. The mobile device sends the audio signal containing the UsbKey command to the analog-to-digital conversion module of the transfer device. The analog-to-digital conversion module processes the audio signal, analyzes and restores the original UsbKey command data, the analog-to-digital conversion module sends the UsbKey command data to the UsbKey protocol conversion module, the protocol conversion module encapsulates the UsbKey command data into a protocol recognizable by the UsbKey, and the protocol conversion mod...

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Abstract

The invention disclose a system and a method for realizing public key infrastructure (PKI) application by an audio interface switching over universal serial bus (USB) protocol equipment. The system comprises a function application application programming interface (API) module, a chip operating system (CoS) instruction enclosing module, an audio frequency communication module, an analog-to-digital/digital-to-analog converter, a USB protocol processing module and a Usbkey device.

Description

technical field [0001] The present invention relates to a PKI (public key infrastructure) digital certificate application system and method, in particular to a system and method for realizing PKI application by switching USB protocol equipment through an audio interface. Background technique [0002] Currently, the UsbKey (USB protocol digital certificate device) commonly used on PC (personal computer) includes two types: no key, no display key and key with key, key with display. Key, which greatly guarantees the security of the user's digital certificate, and the Key with buttons and display screen gives users a chance to review and confirm when digital signing, which further avoids the possibility of hacking. [0003] At present, the existing digital certificate storage methods based on mobile devices include: file storage, SD (Secure Digital) card storage, Sim (Subscriber Identification) card patch storage, etc. The file certificate storage process is: encrypt and store ...

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Application Information

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IPC IPC(8): H04L9/32G06F21/00G06F21/32
Inventor 李达李闯
Owner CHINA FINANCIAL CERTIFICATION AUTHORITY
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