Two-dimensional code security enhancement method and device based on screen dimming characteristics

A technology of two-dimensional code and coding method, which is applied to instruments, inductive record carriers, electromagnetic radiation induction, etc., to prevent two-dimensional code attacks and increase security.

Active Publication Date: 2021-05-28
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has changed the user's current payment habits and also added a lot of inconvenience
There are also some other solutions, but these methods either require special equipment or networking, or require the user to place the mobile phone in a specific position to realize the recovery of the two-dimensional code image, which brings a lot of inconvenience to the user, so these solutions At present, the scheme has various shortcomings

Method used

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  • Two-dimensional code security enhancement method and device based on screen dimming characteristics
  • Two-dimensional code security enhancement method and device based on screen dimming characteristics
  • Two-dimensional code security enhancement method and device based on screen dimming characteristics

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Embodiment 1

[0050] A two-dimensional code security enhancement method based on screen dimming features, such as figure 1 As shown, it includes an encoding method and a decoding method, and the encoding method includes the following steps:

[0051] A1. Preprocessing stage: determine the phase difference Δ of each line of PWM dimming of the screen of the terminal device S (Phase difference Δ per line S is the fixed parameter of the screen, provided by the screen manufacturer), and the display of the QR code on the screen of the terminal device is set to a fixed pixel size, and the length and width are X S pixels, to determine the screen PWM frequency f of the end device PWM ;

[0052] A2. Encoding stage: set the screen PWM frequency f PWM and each line phase difference Δ S Encode it into the QR code and display the QR code on the screen of the terminal device;

[0053] The decoding method includes the following steps:

[0054] B1. The scanning device scans the screen of the terminal ...

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Abstract

The invention relates to a two-dimensional code security enhancement method and device based on screen dimming characteristics, the method comprises an encoding method and a decoding method, and the encoding method is to encode the screen PWM frequency and the phase difference of each row into a two-dimensional code; the decoding method comprises the following steps: decoding the two-dimensional code to obtain the screen PWM frequency fPWM contained in the two-dimensional code, determining the screen PWM frequency f 'PWM of the terminal equipment through scanning equipment; if the difference value between the fPWM and the f' PWM is smaller than a precision threshold value, determining that the security verification is passed, and otherwise, determining that the security verification is not passed. Compared with the prior art, the screen PWM frequency of the terminal equipment is encoded into the two-dimensional codes, so that each two-dimensional code is bound with the screen of the terminal equipment encoding the two-dimensional code, and after the scanning equipment determines the PWM frequency of the current screen and decodes the two-dimensional codes, the PWM frequency in the two-dimensional codes is compared with the PWM frequency of the current screen, so that two-dimensional code attack is prevented.

Description

technical field [0001] The invention relates to the technical field of two-dimensional code encoding and decoding, in particular to a two-dimensional code security enhancement method and device based on screen dimming features. Background technique [0002] Quick Response Code (QR Code) is a graphic that is distributed on a plane according to certain rules, black and white, and records data symbol information. With the gradual popularity of built-in cameras in smartphones in recent years, and the advantages of large storage capacity and fast reading speed of QR codes, QR codes have become an indispensable part of daily life. QR codes have been widely used in various mobile applications, such as advertising push, identity card or mobile payment. Especially in the field of mobile payment, the QR code system has become a standard module used by major payment application service providers. During the payment process, the user only needs to show the QR code on the screen of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K7/14
CPCG06K7/1417G06K7/1443G06K7/146
Inventor 薛广涛陈奕超李熠劼
Owner SHANGHAI JIAO TONG UNIV
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