Novel high-security image secret sharing method

Abstract

The invention discloses a novel high-security image secret sharing method. The method comprises the steps of obtaining a matrix Ds composed of a plurality of pixel value functions according to a secret image to be shared; indexing and storing pixel coordinates and corresponding pixel values of the secret image, and obtaining a scrambled pixel matrix S1 according to the matrix Ds; determining a (k,n) threshold of secret sharing, and constructing a check matrix H on a finite field GF (2m); obtaining n shadow images and distributing the n shadow images to n trusted participants; and calculatingunknown n-k shadow image data according to the known k shadow images so as to recover the secret image. In order to solve the problems in the prior art that the algorithm time complexity is too high and the sub-secret images are too large in capacity to increase the storage and transmission burden, the image is split and reconstructed by combining a generation matrix and a check matrix of the MDScode, the image recovery accuracy is ensured, and meanwhile, the method has the advantages of reducing the algorithm time complexity, improving the image recovery efficiency, and shortening the secretimage splitting and reconstruction time.

Description

technical field [0001] The invention relates to the technical field of computer software, in particular to a novel high-security image secret sharing method. Background technique [0002] With the increasing development of the Internet and the popularity of mobile phones, computers, cameras and other equipment, it is becoming more and more common for people to use images to record life, important information and personal privacy, but the security issues of image storage and transmission that follow people's attention. Therefore, in the late 1970s, two scholars, Shamir and Blakley, proposed the image secret sharing technology, which is an important branch of modern cryptography. With the development of technology, it has become a solution to contemporary information security and key management and One of the effective means of secure storage and access control of image data. This technology is widely used in fields such as medicine, military affairs and scientific research....

AI Technical Summary

Problems solved by technology

The calculation time complexity of the above two methods is too high, and the segmented shadow image is as large as the original image, which increases the burden of transmission

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