Asynmmetric ciphering and deciphering method and apparatus based on virtual wavefront coding

Abstract

This invention discloses an asymmetrical ciphering and deciphering method based on virtual wave front coding and a device, which utilizes an optical model of wave front sensing to set up a public cryptographic key and a private key, the ciphering process is to carry out virtual optical wave front coding to the original image to be encrypted then wave front sensing and centroidal computation to get the cryptograph, the deciphering process is to utilize rule lattice and the cryptograph for wave front re-establishment to recover the original image information. A device for realizing said method includes a digital signal processor, a site programmable gate array, a video code-decode device, a PCI bys controller, an Ethernet interface controller, a synchronous burst static storage, a synchronous dynamic storage, a supply monitor circuit and a reset control circuit.

Description

technical field [0001] The invention relates to an asymmetric encryption and decryption method and device based on virtual wavefront coding, belonging to the field of optical information processing. Background technique [0002] Data encryption and information hiding technology based on optical theory and method is a new generation of information security theory and technology that has started to develop internationally in recent years. Parallel data processing is an inherent capability of optical systems in which every pixel in a two-dimensional image can be transmitted and processed simultaneously. When processing a large amount of information, the parallel processing capability of the optical system obviously has an absolute advantage, and the more complex the processed image and the greater the amount of information, the more obvious this advantage will be. At the same time, optical encryption devices have more degrees of freedom than electronic encryption devices, and ...

AI Technical Summary

Problems solved by technology

The main reason is that optical components based on free space propagation are large in size, high in cost, inflexible in use, and inconvenient for analog-to-digital conversion

Systems constructed with such optical components are difficult to apply in practical data encryption

[0004] Moreover, from the point of view of cryptography, most of the work on optical encryption reported in the world belongs to the category of symmetric cryptography, and there are very few studies on optical asymmetric cryptography (public key cryptography)

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