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Encrypting method and device for real time optical image

A technology of optical image and encryption device, which is applied in the field of network communication, can solve problems such as security doubts, achieve high security and improve security

Inactive Publication Date: 2007-04-11
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these encryption techniques can only encrypt one or several images
Moreover, some encryption systems still have the problem of precise positioning; some encryption technologies can be completely deciphered as a random phase plate as a key under active ciphertext attacks, and the security is doubtful

Method used

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  • Encrypting method and device for real time optical image
  • Encrypting method and device for real time optical image
  • Encrypting method and device for real time optical image

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the embodiments and accompanying drawings, but the protection scope of the present invention should not be limited thereby.

[0029] Please refer to FIG. 1 first. FIG. 1 is a schematic structural diagram of an embodiment of a real-time optical image encryption device of the present invention. As can be seen from the figure, the real-time optical image encryption device of the present invention includes an optical image encryption device 1 and an optical image decryption device 2, characterized in that:

[0030] The composition of the optical image encryption device 1 includes: a first laser 101, followed by a beam expander 102 and a beam splitter 104 along the laser output direction of the first laser 101, and the beam splitter 104 divides the laser beam into transmitted beams and the reflected light beam, the transmission direction of the beam splitter 104 is the polarizing prism 105, the informa...

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Abstract

The invention relates to a real-time optical image encryption method and its device. In which, using the linear polarizing light as the carrier of the original optical image information, the light interacts with the encryption body, then it interferes with the coherent light into the encrypted interfered light and enters into transmission. During the decryption process, using the reversible optical principle, the encrypted coherent light is received by the photorefractive crystal and interacts with the coherent light and the mentioned encryption body in an opposite sequence, then it shows on a detector output. The described encryption body includes at least one computer controlled spatial light modulator.

Description

technical field [0001] The invention relates to network communication, in particular to a real-time optical image encryption method and device, in particular to an optical method and device for real-time encryption of image information by using the polarization state of light. Background technique [0002] Since the invention of molded holographic technology in the 1970s, holograms have been made into anti-counterfeiting marks and widely used in various certificates and credit card products. However, with the development of computer technology and the widespread application of photodetector CCDs, the phenomenon of ordinary holograms being copied is becoming more and more serious. With the development of modern network technology, people pay more and more attention to network information security. Due to its advantages of high processing speed, high parallelism, high encryption dimension and large spatial bandwidth, optical information processing technology has shown great a...

Claims

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Application Information

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IPC IPC(8): G02F1/01G02B27/00G03H1/00
Inventor 顾唯兵何红
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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