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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
Inactive Publication Date: 2013-11-27
GUANGDONG UNIV OF TECH
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This algorithm has shortcomings, that is, the key is relatively single, so it cannot be applied
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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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Abstract
The invention relates to a QR two-dimensional code binary image partition-based key-varying chaotic encryption method. The method comprises the following steps that: 1), a traditional logistic chaotic mapping encryption algorithm is improved in a manner that an auxiliary key is added such that a new initial value x0 can be formed; 2), an original QR-code binary image is partitioned, and the total number of sub-region images of which the pixel is 1 is calculated, and therefore, the initial values of random keys of sub-blocks are formed; and 3), the auxiliary key and the random key are combined with partition encryption technology, such that QR code binary image partition-based key-varying chaotic encryption and decryption algorithms can be realized. With the QR two-dimensional code binary image partition-based key-varying chaotic encryption method adopted, random variation of keys can be realized; key space and key paths can be expanded; the reliability and security of encryption can be enhanced; a requirement for QR code information confidentiality in storage and transmission can be satisfied; and at the same time, an encryption effect, encryption speed and cracking difficulty are further improved. The QR two-dimensional code binary image partition-based key-varying chaotic encryption method of the invention is advantageous in convenience, practicability, safety and reliability.
Description
Technical field [0001] The invention is a QR two-dimensional code binary image partition variable key chaotic encryption method, which belongs to the innovative technology of the QR two-dimensional code binary image partition variable key chaotic encryption method. Background technique [0002] With the advantages of QR code (photos, text, numbers, letters, etc. can be encoded, information can be moved with the carrier, information storage capacity is large, with high reliability, strong coding ability, ultra-high-speed and all-round reading, Strong confidentiality and flexibility). In recent years, in the Internet of Things environment, QR code technology has developed rapidly. It has been widely used in manufacturing, finance, commerce, logistics and distribution industries; at the same time, it is used in transportation, transportation, Many fields such as energy, national defense, post and telecommunications, medical and health, logistics management, and library management ar...
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