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

An encryption and decryption, asymmetric technology, applied in key distribution, can solve the problems of inconvenient analog-to-digital conversion, difficult data encryption applications, and very little research on optical asymmetric cryptosystems.

Active Publication Date: 2007-01-03
SHENZHEN ESUN DISPLAY
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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...

Method used

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

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Embodiment Construction

[0060] The present invention will be further described below in conjunction with the accompanying drawings.

[0061] The working principle of virtual wavefront sensing is as follows: figure 1 and figure 2 shown. The virtual microlens array samples the incident wavefront, and each sub-aperture cuts out a sub-wavefront on the wavefront, forming a spot on the observation screen corresponding to the sub-lens. If the incident wavefront is a plane wavefront, we can get A regular reference point matrix, such as figure 1 shown. When the wavefront to be measured changes, the center of mass of the spot on the focal plane of the sub-aperture shifts relative to the reference position, so that an irregular spot matrix is ​​obtained, such as figure 2 shown. By calculating the spot centroid offset, the average gradient of each sub-wavefront can be obtained. Assuming that the incident wavefront phase is φ(x, y), and the focal length of the lens is f, the displacements of the light spo...

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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 ...

Claims

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Application Information

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IPC IPC(8): H04L9/08G06T1/00
Inventor 彭翔张鹏位恒政
Owner SHENZHEN ESUN DISPLAY
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