A Digital Image Encryption Method Based on Bit Plane and High Dimensional Chaotic System
A high-dimensional chaos and digital image technology, applied in image coding, image data processing, instruments, etc., can solve the problems of loss of message sender, network insecurity, loss or destruction of image information, etc.
Active Publication Date: 2020-12-04
HUBEI UNIV FOR NATITIES +1
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[0002] Image is the most commonly used form of information exchange, which is vivid and intuitive. With the rapid development of multimedia technology and the popularization of the Internet, digital images are widely used in military, political and many other fields. However, due to the insecurity of the network, these Image information may be lost or destroyed during the transmission process, and some malicious attackers may also try to use the network to steal the transmitted information to achieve their own improper purposes, and once they steal successfully, it will cause incalculable losses to the message sender , if this information is related to major decisions of government departments or state agencies, the consequences will be disastrous
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[0049] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.
[0050] like figure 1 As shown, a digital image encryption algorithm based on bit plane and high-dimensional chaotic system, including,
[0051] In step a1, a chaotic system is selected, and three chaotic sequences are iteratively generated through the selected chaotic system, and the length of each said chaotic sequence is the same as the size of the image to be encrypted. Said step a1 specifically includes, inputting the 8-bit to-be-encrypted Grayscale image ,make .
[0052] then enter the key , using the equation (1) iteration of the Lorentz chaotic system Second, in order to eliminate the adverse effects of transient effects, discard the chaotic sequence before chaotic sequence .
[0053] (1);
[0054] in, is a system parameter.
[0055] The key space refers to all digital ...
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The invention relates to the image encryption and decryption technology field and especially relates to a digital image encryption algorithm based on a bit plane and a high-dimensional chaotic system. By using the digital image encryption algorithm based on the bit plane and the high-dimensional chaotic system, through a Lorentz chaotic system, three chaotic sequences K1, K2 and K3 are generated. The chaotic sequence K1 is used for scrambling pixel positions. Scrambled images are divided into two 4-bit matrixes of a high 4 bit and a low 4 bit. 100 values are extracted randomly in the low 4-bit matrix. A sum of the100 values is used to reconstruct the chaotic sequences K2 and K3 into two random sequences from 0 to 15. Two rounds of value diffusion are performed on the high 4-bit matrix. Finally, the two matrixes are combined into a 8-bit image matrix and a cryptograph image is acquired. The algorithm possesses a significant one-time pad characteristic, an encryption effect is good, and through a corresponding decryption method, an encryption image can be effectively reverted to an original image.
Description
technical field [0001] The invention relates to the technical field of image encryption and decryption, in particular to a digital image encryption algorithm based on a bit plane and a high-dimensional chaotic system. Background technique [0002] Image is the most commonly used form of information exchange, which is vivid and intuitive. With the rapid development of multimedia technology and the popularization of the Internet, digital images are widely used in military, political and many other fields. However, due to the insecurity of the network, these Image information may be lost or destroyed during the transmission process, and some malicious attackers may also try to use the network to steal the transmitted information to achieve their own improper purposes, and once they steal successfully, it will cause incalculable losses to the message sender , if this information is related to major decisions of government departments or state agencies, the consequences will be d...
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IPC IPC(8): G06T9/00
CPCG06T9/007
Inventor 陈世强刘静漪刘嵩秦柳邱达
Owner HUBEI UNIV FOR NATITIES