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Generation method and generation device for image verification code

A technology of picture verification code and verification code, which is applied to the usage of multiple keys/algorithms, user identity/authority verification, public key for secure communication, etc. It can solve the problem that picture verification codes are easy to be cracked, and achieve simple generation Effect

Inactive Publication Date: 2008-08-06
CHINA MOBILE COMM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] The purpose of the present invention is to provide a method and device for generating a picture verification code with high security and low complexity, so as to solve the problem of low-complexity pictures in the prior art. The problem that the verification code is easy to be cracked

Method used

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  • Generation method and generation device for image verification code
  • Generation method and generation device for image verification code
  • Generation method and generation device for image verification code

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Embodiment Construction

[0052] In order to overcome the defect that the picture verification code in the prior art is easy to be cracked when the complex picture verification code cannot be applied, the embodiment of the present invention provides a picture verification code generation method and a picture verification code generation device, which will be described in detail below .

[0053] see figure 1 , is a flow chart of Embodiment 1 of the method for generating a picture verification code provided by the present invention, including the following steps:

[0054] Step 11, randomly generating all verification code characters, for example, randomly generating four characters 4, E, 3, and 6;

[0055] In this step, in order to increase the difficulty of deciphering, pre-stored artistic fonts can be used to generate verification code characters. This kind of artistic font can be provided by the pre-stored artistic font library, and the font provided by the conventional input method is stretched and...

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PUM

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Abstract

The invention discloses a picture identifying code generating method which comprises the following steps: identifying code characters are generated at random; the space position of all identifying code characters in a picture area is generated, and the longitudinal initial position of a first character in the picture area is generated at random; according to the longitudinal termination position of a previous identifying code character, the longitudinal initial position of a next identifying code character in the picture area is generated, thereby ensuring that two adjacent characters have a longitudinal lapping part in the picture area; on the basis of all generated identifying code characters and the space position thereof, a picture identifying code is generated. The invention also discloses a picture identifying code generating device which comprises an identifying code character generating unit, a space position generating unit connected with the identifying code character generating unit and a picture identifying code generating unit connected with both units. The method and the device are difficult to break but are easy to realize.

Description

technical field [0001] The invention relates to a method and device for generating a picture verification code, belonging to the field of network security. Background technique [0002] In the field of the Internet, in order to prevent continuous login attempts for a specific registered user by using a specific program, so as to achieve brute force cracking, many websites have introduced a picture verification code for verification, that is, the user must correctly enter the verification code displayed in the picture. code to be allowed to log in. [0003] The so-called picture verification code is to use a string of randomly generated numbers or symbols as the verification code, and generate a picture based on the verification code for display. The user can visually identify the verification code information, enter the form and submit it to the website for verification. After the verification is successful Ability to license the use of a feature. [0004] Traditional pict...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/32H04L9/14H04L9/30
Inventor 黄卿何彬张炎唐剑峰
Owner CHINA MOBILE COMM GRP CO LTD
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