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.
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[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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