QR two-dimensional code binary image partition-based key varying chaotic encryption method
A binary image and chaotic encryption technology, which is applied in digital transmission systems, instruments, calculations, etc., can solve the problems of single key and cannot be used in occasions with high security level of confidentiality time, and achieve the effect of improving security
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[0044] The present invention is based on a QR code binary image partition variable key chaotic encryption method, including the following steps:
[0045] 1) Improve the traditional Logistic chaotic map encryption algorithm and add auxiliary keys to form a new initial value x 0 ;
[0046] 2) Partition the original QR code binary image, calculate the total number of pixels in each sub-region image with "1", thereby forming the initial value of the random key for each sub-block;
[0047] 3) Combine auxiliary key, random key and partition encryption technology to realize QR code binary image partition variable key chaotic encryption and decryption algorithm.
[0048] In the above step 1), a new initial value x is formed 0 The method is:
[0049] The improved Logistic chaotic map encryption algorithm utilizes the characteristics of chaotic map sensitive to initial values, obtains auxiliary keys to form a dynamic initial value, and improves the difficulty of deciphering the chaotic map encryp...
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