Image encryption method based on on-ring two particle one-dimensional discrete quantum walk

Abstract

The invention relates to an image encryption method based on on-ring two particle one-dimensional discrete quantum walk. The purpose is to guarantee safety and high efficiency of an image encryption algorithm and effectively protect an image. The method includes the steps that (1), on-ring two particle one-dimensional discrete quantum walk is used for generating a secrete key matrix; the on-ring two particle one-dimensional discrete quantum walk is operated to generate probability distribution which is converted to a secrete key sequence S, and the sequence S is converted into a matrix P; (2), the image is encrypted, logic exclusive or is performed on the matrix P and the original image I to generate a mixed image E, M values and N values are randomly and respectively selected from the sequence S, so that a sequence X and a sequence Y are respectively obtained, and ascending sort is performed on the two sequences to respectively obtain two new sequences. The two new sequences IX and IY are used for rearranging the encrypted image E to obtain a final encrypted image E'. Compared with an existing image encryption method, the image encryption method is easier to operate, higher in speed, better in performance and encryption quality and capable of meeting practical needs better.

Description

technical field [0001] The invention belongs to the field of information security and relates to image encryption technology, in particular to an image encryption method based on two-particle one-dimensional discrete quantum walks on a ring. Background technique [0002] With the development of information technology, the Internet has become the main tool for information dissemination, not only the transmission of general text information, the Internet and communication can also transmit a large amount of image data. The intuitiveness of images is loved by people. For some special images, in order to prevent personal privacy from being threatened, people often need to encrypt them before transmission to prevent them from being read by illegal users. At present, the biggest challenge in transmitting image data is the lack of security and efficiency, so quite a lot of people are working hard on the research of image encryption. [0003] In recent years, with the rapid develop...

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Unfortunately, Arnold's cat mapping has two drawbacks: limited number of iterations, usually less than 1000, and equality constr

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