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Matrix obtaining method, character display device and system and electronic signature tool

An electronic signature tool and character display technology, applied in the electronic field, can solve the problems of increasing the cost of electronic signature tools and the inability of memory to meet the storage requirements, and achieve the effects of ensuring correctness and security, saving costs and saving storage space.

Active Publication Date: 2014-06-04
TENDYRON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The memory of the security chip in the general electronic signature tool cannot meet the demand for storing such a large font. Therefore, most of them use a memory extended outside the security chip to store the font.
However, expanding a memory outside the security chip to store fonts will increase the cost of electronic signature tools

Method used

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  • Matrix obtaining method, character display device and system and electronic signature tool
  • Matrix obtaining method, character display device and system and electronic signature tool
  • Matrix obtaining method, character display device and system and electronic signature tool

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0037] figure 1 It is a schematic structural diagram of the font acquisition system of the present invention; in this embodiment, the font acquisition system includes: a transaction terminal (character storage device) and an electronic signature tool (character display device).

[0038]Specifically, the transaction terminal can be a computer or a mobile phone. It stores a font library of fonts corresponding to each character, wherein the characters may include: Chinese characters (traditional, simplified, etc.), numbers, letters, symbols, special characters, etc.

[0039] The electronic signature tool is used to store the check codes of the fonts corresponding to each character to form a check code library. The check code library corresponds to the font library of the fonts stored in the transaction terminal. Of course, the font identification code can be used to correspond, for example : Through the internal code, area code or custom font identification code; the electronic ...

no. 2 example

[0066] The difference between the second embodiment of the present invention and the first embodiment lies in that the method of obtaining the verification code is different from that of the first embodiment. In this embodiment, the electronic signature tool calculates the MAC value of each font by calculating the MAC (Message Authentication Code, message authentication code) value of the font in advance, and uses the MAC value of each font as a check code to form a check code library Stored in the secure chip of the electronic signature tool. The verification code library corresponds to the font library of the fonts stored in the transaction terminal.

[0067] After receiving the font issued by the transaction terminal, the electronic signature tool calculates the verification code of the font issued by the transaction terminal according to the calculated MAC value.

[0068] Of course, if the calculated MAC value is too large, several digits in the MAC value can be intercept...

no. 3 example

[0071] The difference between the third embodiment of the present invention and the first embodiment lies in that the method of obtaining the check code is different from that of the first embodiment. In this embodiment, the electronic signature tool calculates the HASH value of each glyph by a hash algorithm (for example: MD5, Message Digest Algorithm, the fifth edition of the message digest algorithm) in advance, and uses the HASH value of each glyph as a check code to form a verification code. The code verification library is stored in the security chip of the electronic signature tool. The verification code library corresponds to the font library of the fonts stored in the transaction terminal.

[0072] After receiving the font issued by the transaction terminal, the electronic signature tool calculates the verification code of the font issued by the transaction terminal according to the calculated HASH value.

[0073] Of course, if the calculated HASH value is too large,...

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PUM

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Abstract

A matrix obtaining method, a character display device and system and an electronic signature tool. The matrix obtaining method comprises the following steps: the character display device receives a matrix sent by a matrix storage device; the character display device calculates the check code of the matrix sent by the matrix storage device; the character display device compares the calculated check code of the matrix with the locally-stored corresponding matrix check code; and if the two check codes are consistent, the character display device determines that the matrix sent by the matrix storage device is correct. Through the method, the character can be displayed by obtaining the matrix stored in the matrix storage device so as to reduce the cost of the character display device. The matrix storage device may be a transaction terminal including a computer, a mobile phone and the like, and the character display device may be an electronic signature tool.

Description

technical field [0001] The present invention relates to the field of electronic technology, in particular to a font acquisition method, a character display device and system, and an electronic signature tool. Background technique [0002] In traditional electronic signature tools (such as USBKEY), characters (including Chinese characters, numbers, letters, symbols, etc.) are represented, exchanged and processed in the form of internal codes. When a character needs to be displayed, the electronic signature tool converts the internal code of the character to be displayed into an area code, uses the area code to extract the font of the character to be displayed from the font library stored in the electronic signature tool, and then draws dots on the screen according to the font information method to display the characters. [0003] In this case, due to the need to store fonts corresponding to all characters to be displayed, the electronic signature tool requires a relatively l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G5/22G06F3/14
CPCG06F21/32G06F21/44G06F21/64G06F40/109H04L1/00H04L63/123
Inventor 李东声
Owner TENDYRON CORP