Medical image encryption method based on uniform scrambling and chaotic mapping

Abstract

A medical image encryption method based on uniform scrambling and chaotic mapping, belongs to the technical field of network image communication, and includes the following steps: 1, arranging a secret key and generating a random number sequence; 2, dividing a medical image into a plurality of small squares; 3, performing uniform scrambling operation to the medical image; 4, multiplying the generated pseudo random number by a pixel factor, 5, performing round-off and then performing xor with the original pixel; and performing the steps 1 to 5 repeatedly for all the pixels, traversing the medical image and summarizing all the pixels, and finally finishing the image encryption. The medical image encryption method based on uniform scrambling and chaotic mapping, provided by the invention, is simpler and quicker in encryption compared with the conventional method, can better cover the two-dimensional information of the image compared with the dimensional flow password encryption method, and lays emphasis on misdiagnose danger caused by falsification attack and has better falsification attack resistance especially in the field of medical image encryption.

Description

technical field [0001] The invention relates to the technical field of network image communication, in particular to an information hiding method of medical images. Background technique [0002] In recent years, with the development of network and computer technology, people pay more and more attention to information security. Images can store a large amount of information, and image encryption has its unique value in many fields. Especially in the medical field, in order to protect the privacy of patients and some academic secrets, the encryption of medical images during transmission and storage is very important. [0003] Because of the large amount of information in image encryption, many traditional encryption technologies such as AES (Advanced Encryption Standard), etc., have a long and complicated encryption process due to the complexity of the algorithm, and the amount of calculation is huge. The time required to encrypt a picture is too long, so it is not necessary....

AI Technical Summary

Problems solved by technology

[0003] Because of the large amount of information in image encryption, many traditional encryption technologies such as AES (Advanced Encryption Standard), etc., have a long and complicated encryption process due to the complexity of the algorithm, and the amount of calculation is huge. The time required to encrypt a picture is too long, so it is not necessary. practical

And on the other hand, images have two-dimensional continuity of two-dimensional information, which is greatly different from one-dimensional information, so many traditional encryption functions designed for one-dimensional information cannot ensure that image information can be well covered

[0004] The transmission and storage of medical images are different from ordinary image encryption. The threat of attacks such as tampering must be considered. Tampering may cause serious problems such as misdiagnosis

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