A chaotic medical image encryption method for privacy protection
A technology of medical images and encryption methods, applied in digital transmission systems, electrical components, transmission systems, etc., can solve problems that can only be applied to square images
Active Publication Date: 2016-09-07
辽宁康恒科技有限公司
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[0014] Aiming at the shortcomings of the prior art, the present invention proposes a chaotic medical image encryption method applied to privacy protection, in order to optimize the comprehensive performance of scrambling effect and scrambling speed, and solve the periodicity and only applicable Problems with square images, and the purpose of improving execution efficiency
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[0063] An embodiment of the present invention will be further described below in conjunction with the accompanying drawings.
[0064] The embodiments of the present invention are implemented based on the "scrambling-diffusion" architecture, and different rounds of encryption can be performed according to security requirements, that is, the more encryption rounds, the higher the security. The minimum requirement of this encryption system is 2 rounds. In this embodiment, a 256-level grayscale (8-bit color depth) medical image ( figure 2 Middle figure (a)) implements encryption;
[0065] A chaos medical image encryption method applied to privacy protection, the flow chart is as follows image 3 shown, including the following steps:
[0066] Step 1, set up three logistic chaotic maps, set the control parameters of the three logistic chaotic maps, make the logistic chaotic maps work in a full-shot state, and set the key of the encryption system by the encryptor;
[0067] The t...
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The invention relates to a chaos medical image encryption method applied to privacy protection, and belongs to the technical field of image encryption. The chaos medical image encryption method includes the steps that driving is carried out through three independent logistic chaotic maps, in the scrambling stage, each pixel point in an image is exchanged with another pixel point, and the position of a target pixel point is generated by two logistic chaotic maps; key streams used in the diffusion stage are generated by the third logistic chaotic map; in the key stream generating process, each key stream element is controlled by plaintext pixels to conduct circulating shifting operation to achieve the aim of relating the key streams and plaintexts. By means of the medical image encryption method, the scrambling effect and the scrambling speed overall performance are superior to those of an existing scrambling method, and the overall speed of an encryption system is remarkably superior to a common grouping encryption method in the modern cryptography; the cryptography analysis results show that the provided encryption method can effectively resist to various common attack techniques.
Description
technical field [0001] The invention belongs to the technical field of image encryption, and in particular relates to a chaotic medical image encryption method applied to privacy protection. Background technique [0002] The history of human medical imaging can be traced back to the discovery of X-rays by German physicist Roentgen in 1895; in February 1896, Scottish doctor John McIntyre set up the world's first radiology department in the Glasgow Royal Hospital, marking a milestone in the history of human medicine. Opened a new page; In the past half century, with the rapid development of multidisciplinary technologies such as radiology, physics, semiconductor science, computer science, and control science, humans have successively invented a variety of human body imaging technologies, such as: CT , MRI (magnetic resonance imaging), DSA (digital subtraction), NM (nuclear medicine imaging), US (ultrasound imaging device), CR (computed projection radiography), PET (positron em...
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IPC IPC(8): H04L9/00
Inventor 詹永丰周巍杨春梅刘文岐胡英杰王东亮
Owner 辽宁康恒科技有限公司