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Multi-image encryption and authentication method based on intensity transmission equation and photon counting

A transmission equation and photon counting technology, which is applied in computing, digital data protection, electrical digital data processing, etc., can solve problems such as chosen plaintext attacks, and achieve the effect of easy recording and transmission, and high robustness

Inactive Publication Date: 2019-11-19
XIAN UNIV OF TECH
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Problems solved by technology

[0003] However, due to the inherent linearity of DRPE-based schemes, it is vulnerable to chosen-plaintext attacks, chosen-ciphertext attacks, and known-plaintext attacks

Method used

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  • Multi-image encryption and authentication method based on intensity transmission equation and photon counting
  • Multi-image encryption and authentication method based on intensity transmission equation and photon counting
  • Multi-image encryption and authentication method based on intensity transmission equation and photon counting

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Embodiment Construction

[0075] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0076] The method for multi-image encryption and authentication based on the intensity transfer equation and photon counting of the present invention specifically includes the following steps:

[0077] Step 1: By evaluating the spatial frequency coefficients, tiles are selected from multiple plaintext images to synthesize a phase φ, which is combined with a generated random intensity mask R to form the complex amplitude u.

[0078] The encryption process of this method is as follows figure 1 As shown, initially, each such as image 3 The plaintext image shown is segmented into non-overlapping tiles with p×q pixels. As an effective estimate of the overall activity level, the spatial frequency can reflect the sharpness of blocks in the image, which is calculated mathematically as:

[0079]

[0080] where B (k) represents one of t...

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Abstract

The invention provides a multi-image encryption and authentication method based on an intensity transmission equation and photon counting. The method comprises the steps of initially, evaluating spatial frequency coefficients; synthesizing a phase-coded plaintext using an important block selected from a plurality of plaintext images, the spatial frequency coefficient being combined with a random intensity mask generated using Logistic mapping to constitute a complex amplitude, and then encrypting the complex amplitude into a real-value ciphertext having a noise-like distribution by using Fresnel diffraction; in an authentication process, reconstructing phase information by solving an intensity transfer equation, and identifying the presence of a plaintext image by calculating, by means ofa corresponding binary mask, a non-linear correlation between it and its partial data containing only valid blocks extracted from the phase information. According to the multi-image encryption and authentication method based on the intensity transmission equation and photon counting. The safety of an optical authentication system is further enhanced.

Description

technical field [0001] The invention belongs to the technical field of optical image encryption, in particular to a multi-image encryption and authentication method based on intensity transfer equation and photon counting. Background technique [0002] As an important optical method developed by Refregier and Javidi, dual random phase encoding (DRPE) can be used to encrypt plaintext images into stationary white noise by using two statistically independent random phase masks, which are respectively located in the cascade Input plane and Fourier transform plane under the framework of optical architecture. Nowadays DRPE has been extended to different domains, such as Fresnel transform domain, fractional Fourier transform domain and gyrator transform domain. Meanwhile, information security methods combined with other optical techniques such as polarized light, photon counting, diffraction imaging, compressed sensing, joint transform correlators, integral imaging, iterative phas...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F21/60
CPCG06F21/602
Inventor 隋连升赵小宇王战敏
Owner XIAN UNIV OF TECH
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